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Revision 5042 - Directory Listing
Modified Thu Jun 28 01:31:09 2007 UTC (12 years, 6 months ago) by dpvc
Recent changes to automatically do promotion in the Value methods was
a mistake.  I put it back into the subclass methods again.

Revision 5041 - Directory Listing
Modified Wed Jun 27 23:30:54 2007 UTC (12 years, 6 months ago) by dpvc
Fixed incorrect use of numeric rather than string comparison.

Revision 5040 - Directory Listing
Modified Wed Jun 27 22:45:39 2007 UTC (12 years, 6 months ago) by dpvc
Don't create a new copy of an object if it is already of the correct
class in promote().

Revision 5039 - Directory Listing
Modified Wed Jun 27 20:22:20 2007 UTC (12 years, 6 months ago) by dpvc
OOPS, the example in the previous message is wrong.  You need to use

      $a = Context()->variables->get("a")->{value};
      $b = Context()->variables->get("b")->{value};

(brtaces around the "value").

Revision 5038 - Directory Listing
Modified Wed Jun 27 20:20:12 2007 UTC (12 years, 6 months ago) by dpvc
Adaptive-parameter values are now stored in the Context so that they
can be retreived if needed.  E.g.,

    Formula("a x + b") == Formula("5 x - 3");
    $a = Context()->variables->get("a")->value;
    $b = Context()->variables->get("b")->value;

will have $a equal to 5 and $b equal to -3.

Revision 5037 - Directory Listing
Modified Wed Jun 27 19:50:45 2007 UTC (12 years, 6 months ago) by dpvc
Changed the with() method to produce a (shallow) copy rather than
modify the original object.  So now $x->with(foo=>'bar') will make a
copy of $x with a field "foo" set to "bar" rather than set "foo" to
"bar" in $x itself.

(This is in response to discussion from our June 26th meeting at UofR.)

Revision 5027 - Directory Listing
Modified Sat Jun 23 20:20:09 2007 UTC (12 years, 6 months ago) by dpvc
Forgot to handle context in the make() method.

Revision 5026 - Directory Listing
Modified Sat Jun 23 20:08:07 2007 UTC (12 years, 6 months ago) by dpvc
Make the Package method really be a method of the context rather than
the Value objects, and make the Value method call the context one.
This means it is not necessary to pass the context as a parameter any
longer.

Revision 5025 - Directory Listing
Modified Sat Jun 23 20:05:49 2007 UTC (12 years, 6 months ago) by dpvc
Was taking the context form the wrong position in the parameter list.

Revision 5024 - Directory Listing
Modified Sat Jun 23 19:46:00 2007 UTC (12 years, 6 months ago) by dpvc
Fix typo, and handle case where Allow is called from package.

Revision 5023 - Directory Listing
Modified Sat Jun 23 19:45:17 2007 UTC (12 years, 6 months ago) by dpvc
Make context method work when called from package rather than blessed object.

Revision 5017 - Directory Listing
Modified Fri Jun 22 12:40:32 2007 UTC (12 years, 6 months ago) by dpvc
Left out a "return" in my changes of two weeks ago.  OOPS!

Revision 5016 - Directory Listing
Modified Fri Jun 22 02:39:24 2007 UTC (12 years, 6 months ago) by dpvc
Handle ans_array() correctly again (context issues, and allow parser
to create a formula from an existing subtree).

Revision 5015 - Directory Listing
Modified Fri Jun 22 01:56:06 2007 UTC (12 years, 6 months ago) by dpvc
more fixes to handle the contexts properly.

Revision 5014 - Directory Listing
Modified Fri Jun 22 00:26:47 2007 UTC (12 years, 6 months ago) by dpvc
Fixed context issues and a typo (must have been interrupted when
editing this file earlier).  Also modified the units pattern to allow
trailing spaces.

Revision 5013 - Directory Listing
Modified Thu Jun 21 23:29:10 2007 UTC (12 years, 6 months ago) by dpvc
Don't use \cdot with things like 3i.

Revision 5012 - Directory Listing
Modified Thu Jun 21 23:10:13 2007 UTC (12 years, 6 months ago) by dpvc
Added Package method to the Context object to replace the
Value->Package() calls and simplify the $self->Package calls (don't
have to look up the context again).

Revision 5006 - Directory Listing
Modified Sat Jun 16 02:08:02 2007 UTC (12 years, 7 months ago) by dpvc
Fixed an error with the modulo method, and adjusted formatting.

Revision 5005 - Directory Listing
Modified Sat Jun 16 02:07:07 2007 UTC (12 years, 7 months ago) by dpvc
Fixed a problem with modulo method.

Revision 5004 - Directory Listing
Modified Fri Jun 15 03:17:31 2007 UTC (12 years, 7 months ago) by dpvc
Only set the context if the data is a MathObject.

Revision 5001 - Directory Listing
Modified Tue Jun 12 04:05:56 2007 UTC (12 years, 7 months ago) by dpvc
More fixes for creating items in the corret context.  Also added a
method for looking up the package associated with a particular Parser
class (for consistency with the Value->Package call).

Revision 5000 - Directory Listing
Modified Tue Jun 12 01:02:05 2007 UTC (12 years, 7 months ago) by gage
done testing

Revision 4999 - Directory Listing
Modified Tue Jun 12 01:00:53 2007 UTC (12 years, 7 months ago) by gage
testing -- please ignore

Revision 4998 - Directory Listing
Modified Tue Jun 12 01:00:10 2007 UTC (12 years, 7 months ago) by gage
testing -- added a space.

Revision 4997 - Directory Listing
Modified Mon Jun 11 18:16:40 2007 UTC (12 years, 7 months ago) by gage
Fixing docementation so that it can be read from the web.

Revision 4996 - Directory Listing
Modified Sun Jun 10 11:34:27 2007 UTC (12 years, 7 months ago) by dpvc
Allow promote() to accept a context as the first argument so that the
promoted object can be forced into the given context.

Revision 4995 - Directory Listing
Modified Sun Jun 10 01:19:29 2007 UTC (12 years, 7 months ago) by dpvc
Use numeric rather than string comparison to see if contexts are
equal.

Revision 4994 - Directory Listing
Modified Sun Jun 10 01:17:29 2007 UTC (12 years, 7 months ago) by dpvc
Update to handle the fact that the Value package now includes the
context with all MathObjects.  (This may still need some work.)

Revision 4993 - Directory Listing
Modified Fri Jun 8 12:09:53 2007 UTC (12 years, 7 months ago) by dpvc
Added more flexible type checking for MathObject classes.  This makes
it possible to correctly match types even when the context has
specified a different package to handle a given type, for example.

Revision 4992 - Directory Listing
Modified Fri Jun 8 11:05:48 2007 UTC (12 years, 7 months ago) by dpvc
Fixed typo.

Revision 4991 - Directory Listing
Modified Fri Jun 8 02:09:21 2007 UTC (12 years, 7 months ago) by dpvc
Update new() and make() methods to accept a context as the first
parameter (making it easier to create objects in a given context
without having to resort to a separate call to coerce them to the
given context after the fact).

Revision 4990 - Directory Listing
Modified Thu Jun 7 23:48:20 2007 UTC (12 years, 7 months ago) by dpvc
More updates to use the new Value->Package() call.  This will make the
standard object-creation functions like Real() and Complex() use the
new lookup method.

Revision 4989 - Directory Listing
Modified Thu Jun 7 23:47:14 2007 UTC (12 years, 7 months ago) by dpvc
can't use inContext() with the "fake" make that produces perl reals,
so remove it for now.  (Perhaps we should just go with the Reals() and
not try to be fancy about it, since it will often get converted to a
Real anyway).  This will need more work.

Revision 4988 - Directory Listing
Modified Thu Jun 7 23:43:42 2007 UTC (12 years, 7 months ago) by dpvc
Give the MathObjects answer checker a _filter_name so it is easier to recognize.

Revision 4987 - Directory Listing
Modified Thu Jun 7 21:54:46 2007 UTC (12 years, 7 months ago) by dpvc
Added Value->Package(name[,context]) to look up what package is
currently set to handle the named type.  E.g.,
Value->Package("Complex") usually returns "Value::Complex".  These can
be overridden in the Context so that modified vesions of the
MathObjects can be made to replace the existing ones more easily.  In
particular, the Parser classes should call these (not yet implemented)
when they create objects, so that you can override the object they
create.

Also cleaned up some more context issues (with still more to come).

Revision 4986 - Directory Listing
Modified Thu Jun 7 18:19:56 2007 UTC (12 years, 7 months ago) by sroubos
Changed POD documentation

Revision 4985 - Directory Listing
Modified Thu Jun 7 17:42:29 2007 UTC (12 years, 7 months ago) by sroubos
Make readable by POD documentation from the web

Revision 4984 - Directory Listing
Modified Thu Jun 7 13:20:36 2007 UTC (12 years, 7 months ago) by dpvc
Always root the current directory in the templates directory (unless
it is an absolute reference absolute).

Include the set number in the names of PNG files, just like in GIF and
other files, so that they will not conflict with ones of the same name
in other sets.

Revision 4983 - Directory Listing
Modified Thu Jun 7 13:14:52 2007 UTC (12 years, 7 months ago) by dpvc
Allow Compute() to create formulas as well as Value objects (with the
correct answer set to the original formula).

Also update some comments and formatting.

Revision 4982 - Directory Listing
Modified Thu Jun 7 13:12:45 2007 UTC (12 years, 7 months ago) by dpvc
Normalized the definitions of i, j, k, etc.

Revision 4981 - Directory Listing
Modified Thu Jun 7 12:35:02 2007 UTC (12 years, 7 months ago) by dpvc
Context() now always makes a copy of the context, even if it comes
from the problem's local contxt table.  That way it will work
consistently no matter where the context comes from.  (In the past, if
PGcourse.pl made a local copy of a context that it could modify, for
example, then Context() would not copy it when it was called, and that
means problems that relied on Context(name) resetting the context to
its original values would not work properly.

Revision 4980 - Directory Listing
Modified Thu Jun 7 12:30:28 2007 UTC (12 years, 7 months ago) by dpvc
Updated to include some recent changes in documentation and removal of
old commented-out code.

Revision 4979 - Directory Listing
Modified Thu Jun 7 11:59:05 2007 UTC (12 years, 7 months ago) by dpvc
More updates for marking MathObjects with the context in which they
were created, so they should now work like the Formula objects in that
respect.  As they are combined via overloaded operators, they should
pass on their contexts correctly.

Also normalized the use of getFlag() to obtain flags from the
MathObject's context rather than looking in the context directly.
This allows the math object to override the flag by setting the flag
value in the object's hash (e.g., $f->{tolerance} = .001).  I've also
added the ability to override context flags via the answerHash (e.g.,
$f->cmp(tolerance => .001)), though some filtering may need to be
added to this at some point.  Note that ONLY the context flags can be
overridden, not other parts of the context.

Revision 4978 - Directory Listing
Modified Wed Jun 6 23:23:34 2007 UTC (12 years, 7 months ago) by dpvc
This file is now obsolete since the functionality has been added to
the Real and Complex objects directly.  So this file is maintained
only for backward compatibility.

Revision 4977 - Directory Listing
Modified Wed Jun 6 23:02:06 2007 UTC (12 years, 7 months ago) by dpvc
Foxed some documentation.  You use the standard "Numeric" and
"Complex" contexts, not "RealPeriodic" and "ComplexPeriodic",
for these.

Revision 4976 - Directory Listing
Modified Wed Jun 6 23:00:14 2007 UTC (12 years, 7 months ago) by dpvc
Added comparisons for periodic reals and complex numbers (numbers that
match up to reduction module some number).  This makes
contextPeriodic.pl obsolete, but the problems that use it should not
need to change.  (It would be good to remove the loadMacros() call,
however.)

Reals and Complex numbers now overload the % operator for the modulo
operation.

Revision 4975 - Directory Listing
Modified Wed Jun 6 21:44:05 2007 UTC (12 years, 7 months ago) by dpvc
This begins some major updates to the Parser and Value libraries.
This may make the MathObjects unstable as things shake down, but I'll
try to keep that to a minimum.

This update reorganizes how the overloading of operations are
implemented.  The base Value class is now overloaded rather than the
individual Value classes.  This makes it easier to make subclasses
that take advantage of the overloading.

The code that handles promoting one MathObject to another has been
updated as a part of this.  This should also make subclassing the
existing MathObjects more flexible.

In the past, Formula objects included a pointer to the Context in
which the object was created, but other MathObject did not.  This
update is the first round of updates to include the context in the
other MathObjects, but more work needs to be done.

The changes here should not affect existing problems; it is possible
that some macro files will need to be updated, but none of the
standard ones in pg/macros seem to need it at the moment.

Revision 4974 - Directory Listing
Modified Wed Jun 6 17:58:03 2007 UTC (12 years, 7 months ago) by gage
This is an experimental version of PGcomplexmacros2Exp.pl

Revision 4969 - Directory Listing
Modified Thu May 24 17:55:37 2007 UTC (12 years, 7 months ago) by gage
Pod documentation upgrades

Revision 4968 - Directory Listing
Modified Thu May 24 12:44:58 2007 UTC (12 years, 7 months ago) by gage
Pod documentation added

Revision 4967 - Directory Listing
Modified Thu May 24 12:05:30 2007 UTC (12 years, 7 months ago) by gage
Added pod documentation

Revision 4966 - Directory Listing
Modified Wed May 23 17:30:35 2007 UTC (12 years, 7 months ago) by gage
Added Davide Cervone's methods for evaluating formulas module 2pi

Used in complex variables in particular.

Revision 4964 - Directory Listing
Modified Tue May 22 18:02:40 2007 UTC (12 years, 7 months ago) by dpvc
Fixed an error with List answer checking when one of the elements was
the constant 0 (a check for whether a value was defined was not
properly handling the case when the answer is zero (which counts as
false in a boolean check)).

Revision 4963 - Directory Listing
Modified Tue May 22 17:46:52 2007 UTC (12 years, 7 months ago) by dpvc
When complex=>'ok' is used, make a COPY of the Complex context before
modifying it.  (Otherwise we modify the ORIGINAL copy, and that is
persistent from problem to problem within one httpd child, which would
mean one problem could affect later ones.)

Revision 4962 - Directory Listing
Modified Wed May 16 00:36:37 2007 UTC (12 years, 8 months ago) by dpvc
Allow Real object to override the context's number format by setting
its format field.  E.g.:

    Real(1.2345)->with(format=>"%.2f")

Revision 4961 - Directory Listing
Modified Tue May 15 17:48:28 2007 UTC (12 years, 8 months ago) by gage
Update pod.

Revision 4930 - Directory Listing
Modified Wed Apr 18 22:37:59 2007 UTC (12 years, 9 months ago) by dpvc
Clear the error message in Context before it is used in an answer
checker (prevents bleading of one error into a later answer).

Revision 4928 - Directory Listing
Modified Tue Apr 17 00:36:16 2007 UTC (12 years, 9 months ago) by dpvc
Modified the way the Parser-based versions of the traditional answer
checkers get copies of their contexts.  They now use a new method
getCopy to obtain the copy either from the problem's context table or
the default table (rather than only from the default).  That way the
instructor can use parserCustomization.pl to customize the contexts
used by the answer checkers.

Revision 4927 - Directory Listing
Modified Tue Apr 17 00:31:13 2007 UTC (12 years, 9 months ago) by dpvc
Added a Vector2D context that has i and j defined as vectors in
2-space so that they can be used to generate vectors in 2D.  This
avoids students getting the "incorrect number of coordinates" error.

Revision 4887 - Directory Listing
Modified Thu Mar 15 22:08:55 2007 UTC (12 years, 10 months ago) by glarose
Update quiz prefix for arrays.  This is not a complete fix, but it
gets incrementally closer to a fix.

Revision 4878 - Directory Listing
Modified Wed Mar 14 00:37:40 2007 UTC (12 years, 10 months ago) by gage
Corrected typo

Revision 4877 - Directory Listing
Modified Wed Mar 14 00:35:38 2007 UTC (12 years, 10 months ago) by gage
Added comments about working with complex variables

Revision 4867 - Directory Listing
Modified Sun Mar 11 16:11:20 2007 UTC (12 years, 10 months ago) by gage
This file loads Parser.pl.   It is part of a campaign to replace the term "parser object"
with MathObject  which should sound more intuitive for those who are unaware of the development
history of the PG language.

Revision 4866 - Directory Listing
Modified Sun Mar 11 11:40:46 2007 UTC (12 years, 10 months ago) by dpvc
Fixed a deprecated usage of defined(@result)

Revision 4856 - Directory Listing
Modified Wed Mar 7 18:34:55 2007 UTC (12 years, 10 months ago) by gage
Added documentation

Revision 4845 - Directory Listing
Modified Tue Mar 6 01:52:26 2007 UTC (12 years, 10 months ago) by gage
Documenation addition

Revision 4844 - Directory Listing
Modified Tue Mar 6 01:51:12 2007 UTC (12 years, 10 months ago) by gage
Format fix

Revision 4834 - Directory Listing
Modified Sun Mar 4 23:39:20 2007 UTC (12 years, 10 months ago) by gage
Formatting changes in documentation

Revision 4833 - Directory Listing
Modified Sun Mar 4 23:26:12 2007 UTC (12 years, 10 months ago) by gage
More format changes to documentation

Revision 4832 - Directory Listing
Modified Sun Mar 4 22:50:35 2007 UTC (12 years, 10 months ago) by gage
More formatting changes.

Revision 4831 - Directory Listing
Modified Sun Mar 4 22:46:01 2007 UTC (12 years, 10 months ago) by gage
Documentation formatting changes

Revision 4829 - Directory Listing
Modified Sun Mar 4 22:10:40 2007 UTC (12 years, 10 months ago) by gage
 Updated documentation in response to comments from Davide.
 More comments welcome. :-)

 --Mike

Revision 4828 - Directory Listing
Modified Sun Mar 4 21:06:17 2007 UTC (12 years, 10 months ago) by gage
Use this macro package to define macros for
examining the current environment.  Useful for
creating problems and for debugging.

Revision 4827 - Directory Listing
Modified Sun Mar 4 20:58:26 2007 UTC (12 years, 10 months ago) by gage
Added pod documentation for these files

Revision 4826 - Directory Listing
Modified Sun Mar 4 20:57:00 2007 UTC (12 years, 10 months ago) by gage
Correct pretty_print so that it protects for HTML output
(replaces < by &lt;)

Revision 4825 - Directory Listing
Modified Sun Mar 4 20:44:37 2007 UTC (12 years, 10 months ago) by gage
Correct pretty_print
so that it protects < for printing in HTML.
Replace occurences of < with &lt; in the data
This was done with straight substitution -- perhaps a protectHTML macro should have been used?

Revision 4824 - Directory Listing
Modified Sat Mar 3 00:31:14 2007 UTC (12 years, 10 months ago) by dpvc
Only show the adaptive parameters where there actually ARE some, and
fix a typo when looking up the adaptive points when there aren't any.

Revision 4823 - Directory Listing
Modified Sat Mar 3 00:17:12 2007 UTC (12 years, 10 months ago) by dpvc
Improved Formula diagonstics when adaptive parameters are used.  They
now allow you to graph the functions (they are no longer considered
multi-variable functions), and the values reported are the adapted
values rather then the unadapted correct answers.  This now correctly
reflects the tests that are being performed.

Revision 4822 - Directory Listing
Modified Sat Mar 3 00:11:28 2007 UTC (12 years, 10 months ago) by dpvc
Use zeroLevelTol values when checking answers that have adaptive parameters.

Revision 4808 - Directory Listing
Modified Thu Mar 1 23:35:18 2007 UTC (12 years, 10 months ago) by gage
Documentation additions

Revision 4806 - Directory Listing
Modified Thu Mar 1 22:43:38 2007 UTC (12 years, 10 months ago) by gage
Minor documentation changes.
Use html entity to represent dollar sign on the web.

Revision 4795 - Directory Listing
Modified Sun Feb 25 20:59:09 2007 UTC (12 years, 10 months ago) by dpvc
Avoid an infinite loop when string-values formulas are used in a List.
Allow diagonstics to work for complex-valued functions.

Revision 4773 - Directory Listing
Modified Sun Feb 11 04:44:27 2007 UTC (12 years, 11 months ago) by dpvc
Added support for uncheckable radio buttons (when JavaScript it
active).  You specify an uncheckable buttons by including the
uncheckable=>1 or uncheckable=>"shift" options to the RadioButtons()
call.

Revision 4772 - Directory Listing
Modified Sat Feb 10 00:09:52 2007 UTC (12 years, 11 months ago) by dpvc
New macros for using Radio buttons with the new Parser

Revision 4771 - Directory Listing
Modified Sat Feb 10 00:07:50 2007 UTC (12 years, 11 months ago) by dpvc
Fixed an error with the custom list checker setting the wrong field
for the checker (OOPS!)

Revision 4767 - Directory Listing
Modified Sat Feb 3 15:32:06 2007 UTC (12 years, 11 months ago) by gage
Changed input to rungeKutta4 so that it matches the pod description --
i.e. it takes as its first argument a reference to a
subroutine defining a vectorField
as opposed to an answer hash.

Revision 4766 - Directory Listing
Modified Sat Feb 3 15:25:18 2007 UTC (12 years, 11 months ago) by gage
Added new permissable log files.
that can be written to.

Revision 4765 - Directory Listing
Modified Sat Feb 3 15:23:05 2007 UTC (12 years, 11 months ago) by gage
Begin pod documentation.

Revision 4764 - Directory Listing
Modified Sat Feb 3 15:20:25 2007 UTC (12 years, 11 months ago) by gage
added a "level" to pretty_print to prevent it from descending too far down
nested hashes.  The default level is set at 3 which is probably enough for
most purposes.

Revision 4762 - Directory Listing
Modified Thu Feb 1 04:37:11 2007 UTC (12 years, 11 months ago) by gage
Removed scommented out code and
spiffed up the documentation.

--------------------------------------------------------------------

Revision 4761 - Directory Listing
Modified Wed Jan 31 16:17:48 2007 UTC (12 years, 11 months ago) by gage
Added code to multi_cmp which makes it easier to  debug.

We will probably want to get rid of this entirely in favor of List answers, but meantime
I'm documenting the problems.

Revision 4760 - Directory Listing
Modified Wed Jan 31 16:16:44 2007 UTC (12 years, 11 months ago) by gage
Added space when combining preview latex strings    (foo  + bar   became   foo\quadbar  which didn't work
now its foo \quad bar which is better.

Revision 4729 - Directory Listing
Modified Sat Dec 16 14:10:12 2006 UTC (13 years, 1 month ago) by dpvc
Add a new operator // to be the same as / except its TeX form is a/b
rather than \frac{a}{b}.  This makes it possible get horizontal
fractions in exponents, for example, where vertical fractions often
don't look so good.

Revision 4728 - Directory Listing
Modified Sat Dec 16 14:07:58 2006 UTC (13 years, 1 month ago) by dpvc
Use Perl reals rather than Parser Reals in matrix for adaptive
parameters.

Revision 4727 - Directory Listing
Modified Sat Dec 16 14:07:22 2006 UTC (13 years, 1 month ago) by dpvc
Fixed type in comment.

Revision 4701 - Directory Listing
Modified Tue Dec 5 23:23:07 2006 UTC (13 years, 1 month ago) by sh002i
changes for DelayedMailer

Revision 4680 - Directory Listing
Modified Tue Nov 28 19:12:12 2006 UTC (13 years, 1 month ago) by sh002i
SECURITY: tighter constraints on which macro files can be loaded without
restriction. Previously, any file that *contained* the strings PG.pl,
dangerousMacros.pl, or IO.pl would be loaded with an empty opmask.

This is the second attempt to close this hole. The previous attempt
assumed that | binds tighter than ^ and $, which is not true. (Noticed
by dpvc). It also failed to escape metacharacters in the file names.

Revision 4679 - Directory Listing
Modified Mon Nov 27 22:11:54 2006 UTC (13 years, 1 month ago) by sh002i
added mail_answers_to3, which currently does not work, to eventually
replace mail_answers_to2, which also does not work.

I thought now would be a good time to commit this, so that others can
look at it if they like. The problem is that when RestrictedMailer is
used within a PG safe compartment, it hangs on opening the SMTP
connection and the problem times out after 60 seconds.

This mockup I made works perfectly however, and I can't see how the PG
safe compartment is different. Here it is:

my $mailer = new WeBWorK::Utils::RestrictedMailer(
        params => {
                from => 'sh002i@math.rochester.edu',
                smtp => 'mail.math.rochester.edu',
                headers => 'X-Remote-Host: 128.151.231.10',
                debug => "debug.txt",
                keepconnection => 1,
                subject => "generic subject",
                on_errors => 'die',
        },
        lock_by_default => 1,
        allow_change => [qw/fake_from to fake_to cc fake_cc bcc/],
        allowed_recipients => [qw/sh002i@math.rochester.edu sam@uofr.net/],
        fatal_errors => 1,
);
my $rmailer = new WeBWorK::Utils::RestrictedClosureClass($mailer,
        qw/Open SendEnc Close Cancel skipped_recipients error error_msg/);
my $safe = new Safe;
${$safe->varglob('the_date')} = `date`;
my $hole = new Safe::Hole {};
my $rmailer_wrapped = $hole->wrap($rmailer);
${$safe->varglob('TEST')}{rmailer} = $rmailer_wrapped;
my $result = $safe->reval(<<'EOF');
my $rmailer = $TEST{rmailer};
my $open_result = $rmailer->Open({
        to => 'sam@uofr.net',
        #subject => "this is only a test",
});
print "open_result=$open_result\n";
my $sendenc_result = $rmailer->SendEnc("Hello world, the time is " . $the_date);
print "sendenc_result=$sendenc_result\n";
$rmailer->Close;
EOF
die "reval threw an exception: $@" if $@;

Revision 4678 - Directory Listing
Modified Mon Nov 27 18:57:41 2006 UTC (13 years, 1 month ago) by sh002i
formatting, ordering

Revision 4673 - Directory Listing
Modified Mon Nov 27 04:21:59 2006 UTC (13 years, 1 month ago) by dpvc
Moved the guts of this to pg/lib/Parser/Legacy/NumberWithUnits.pl,
since most of the code is common.  This is a shell that now only
defines the FormulaWithUnits() function.

Revision 4672 - Directory Listing
Modified Mon Nov 27 04:20:40 2006 UTC (13 years, 1 month ago) by dpvc
Abstracted the NumberWithUnits to a more general ObjectWithUnits and
moved the FormulaWithUnits to this file as well, since most of the
code is common.  Although, strictly speaking, FormulaWithUnits is not
legacy code, since the general object-with-units is here, it will be
easier to maintain FormulaWithUnits here as well.  When the Parser
gets a real units class, all of this can be removed.

Also fixed the unit lookup code to use the actual names from the Units
library, so we can now be more accurate about determining the extent
of the units, and can handle things like '5 kg m / s' now.  In the
case of ambiguous formulas with units, e.g., '5m kg' where m is a
variable, use '5*m kg' or '(5m) kg'.

Revision 4671 - Directory Listing
Modified Mon Nov 27 02:01:24 2006 UTC (13 years, 1 month ago) by gage
Make
Units::fundamental_units  and

Units::known_units  public hashes.

Revision 4670 - Directory Listing
Modified Mon Nov 27 00:08:31 2006 UTC (13 years, 1 month ago) by dpvc
Fixed usage comments to do formulas rather than just numbers.

Revision 4669 - Directory Listing
Modified Mon Nov 27 00:00:46 2006 UTC (13 years, 1 month ago) by dpvc
The Units.pm library only accepts one division within the units, and
the Parser wasn't taking that into account, so students could enter
m/s/s and still get credit even if the units were m/s.  This have been
fixed.

Revision 4668 - Directory Listing
Modified Sun Nov 26 23:59:22 2006 UTC (13 years, 1 month ago) by dpvc
Provides a formula with units (as opposed to a number with units).
This does introduce some ambiguity issues, since variable names could
look like units in some cases.  E.g., s + 5 m/s could look like
(s + 5*m/s) rather than (s + 5) meters/second.

The parser will take the largest string at the end of the answer that
could be treated as units so s + 5m/s is (s+5) meters/second.

The Units.pm library requries units to be separated by * or / and
only one / is allowed, so s + 5m s is (s+5m) seconds not (s+5) m*s.

Something like 5 m/s/s will generate an error (it shouold be written
m/s*s or m/s^2), and 5 kg m/s should be written 5 kg*m/s.

[If we made the hash of known units be public rather than private in
Units, we could do a better job of this, and could treat kg m/s as
kg*m/s for example.]

Revision 4667 - Directory Listing
Modified Sun Nov 26 21:58:43 2006 UTC (13 years, 1 month ago) by dpvc
Fixed a problem where the TeX version included two copies of the units
(one in TeX mode and one from the string() output).

Revision 4666 - Directory Listing
Modified Sun Nov 26 21:57:39 2006 UTC (13 years, 1 month ago) by dpvc
Updated NumberWithUnits to use Parser::LEgacy::NumberWithUnits rather
than having a separate implementation here.  This will guarantee that
it is consistent with num_cmp() and prevents unneeded duplication of
code.

Revision 4665 - Directory Listing
Modified Sun Nov 26 21:28:40 2006 UTC (13 years, 1 month ago) by dpvc
Didn't need to override the perl fields for the integer-only methods,
since all the checking is done in the parser.

Revision 4664 - Directory Listing
Modified Sun Nov 26 21:15:24 2006 UTC (13 years, 1 month ago) by dpvc
This file implements special power operators that check for special
conditions (like no powers of 'e', or only integer powers).  See the
contents of the file for documentation.

Revision 4663 - Directory Listing
Modified Sun Nov 26 20:30:17 2006 UTC (13 years, 1 month ago) by dpvc
Added ability to have additional information given when not enough
test points can be generated for a function comparison.  By default,
this information is NOT shown (since it could give students additional
information about what answer is expectd).  Professors can request it
by setting the 'showTestPointErrors' flag in the Context().

Revision 4662 - Directory Listing
Modified Sun Nov 26 20:11:03 2006 UTC (13 years, 1 month ago) by dpvc
Allow overridden Parser classes to generate error messages that the
student will see.  (For formulas, error messages are trapped silently
by the overridden == and will not be seen.  This lets Parser objects
force a message to be seen.)

Revision 4654 - Directory Listing
Modified Wed Nov 15 16:50:05 2006 UTC (13 years, 2 months ago) by sh002i
SECURITY: tighter constraints on which macro files can be loaded without
restriction. Previously, any file that *contained* the strings PG.pl,
dangerousMacros.pl, or IO.pl would be loaded with an empty opmask.

Revision 4626 - Directory Listing
Modified Fri Nov 3 23:35:31 2006 UTC (13 years, 2 months ago) by dpvc
Made str_cmp accept blank answers again.  Fixes bug #1123.

Note:  if you use blank answers, the "n of the questions remain
unanswered" message will tell you how many of the answers should be
left blank.  It is probably worth working out a method of having blank
entries that are only marked correct when all the other answers are
correct (this would take a special grader; I have this as part of the
weighted grader, but it is not common knowledge).

Revision 4625 - Directory Listing
Modified Fri Nov 3 23:05:37 2006 UTC (13 years, 2 months ago) by dpvc
Fixed problem with checking Matrices of dimension 1 x n.
(Fixes bug 1122.)

Revision 4583 - Directory Listing
Modified Mon Oct 23 11:43:40 2006 UTC (13 years, 2 months ago) by dpvc
Make sure \cdot is only used for a numeric right-hand part (finishes
fix of bug 1114).

Revision 4582 - Directory Listing
Modified Mon Oct 23 11:38:14 2006 UTC (13 years, 2 months ago) by dpvc
Use \cdot when a number is followed by a numeric fraction.
(Fixes bug 1114.)

Revision 4571 - Directory Listing
Modified Fri Oct 13 21:43:47 2006 UTC (13 years, 3 months ago) by dpvc
Fixed problem with function checking when vars are specified with
limits and the vars are not in alphabetical order. (The Parser expects
the limits and test points to have coordinates specified in
alphabetical order, so they need to be reordered if the author has
them in another order.)

Revision 4562 - Directory Listing
Modified Tue Oct 10 15:45:11 2006 UTC (13 years, 3 months ago) by jj
Catch errors which get thrown by other filters.

Revision 4546 - Directory Listing
Modified Thu Oct 5 11:10:06 2006 UTC (13 years, 3 months ago) by dpvc
Fixed bad check for if the complex number is 1 (caused reduce to
incorrectly remove the complex number when used in multiplication).

Revision 4528 - Directory Listing
Modified Wed Sep 27 17:15:18 2006 UTC (13 years, 3 months ago) by dpvc
Fixed problem where a zero with units would me marked as "not looking
like anumber with units".

Revision 4513 - Directory Listing
Modified Fri Sep 22 16:36:57 2006 UTC (13 years, 3 months ago) by dpvc
Make ijk mode use the TeX definitions from the i, j and k constants as
defined in the context, if they exist, otherwise fall back on the
defaults.

Revision 4512 - Directory Listing
Modified Thu Sep 21 22:08:49 2006 UTC (13 years, 3 months ago) by dpvc
Fix problem with formula comparisons involving vector-valued formulas.
The coordinates for the vectors used in checking equality were plain
Perl reals rather than Parser-based reals, and so the comparisons were
being done using exact rather than fuzzy comparisons.

Revision 4511 - Directory Listing
Modified Wed Sep 20 23:38:38 2006 UTC (13 years, 4 months ago) by dpvc
Make a more sophisticated unit check so that it will handle things
like "3ft / s" (that don't have a space before the units).

Really need to make a units class for the Parser.

Revision 4510 - Directory Listing
Modified Wed Sep 20 21:50:56 2006 UTC (13 years, 4 months ago) by dpvc
Fixed unit checking so that units can include spaces (like 4 ft /
min).  Also fixed a problem where units were not being reported as
part of the student's entered answer.

Revision 4488 - Directory Listing
Modified Mon Sep 11 22:23:45 2006 UTC (13 years, 4 months ago) by dpvc
Allow matrices to set their own templates (instead of using "c" for
all columns), and handle missing open and close delimiters better.

Revision 4487 - Directory Listing
Modified Mon Sep 11 22:21:49 2006 UTC (13 years, 4 months ago) by dpvc
Allow the _check subroutine to affect the {isConstant} field.

Revision 4464 - Directory Listing
Modified Sat Sep 9 00:22:13 2006 UTC (13 years, 4 months ago) by dpvc
Add parenthesis around ijk vectors for string concatenation.

Revision 4454 - Directory Listing
Modified Thu Sep 7 01:18:08 2006 UTC (13 years, 4 months ago) by dpvc
Added ability to overrid TeX and perl versions by specifying a TeX or
perl field in the variable definition.  Also made vector-valued
variables show up in bold.

Revision 4424 - Directory Listing
Modified Tue Aug 29 11:14:28 2006 UTC (13 years, 4 months ago) by dpvc
Check routine can now return an array rather than an array reference.
(This requires pg/lib/Value/AnswerCheckers.pm to be at least version 1.80).

Revision 4423 - Directory Listing
Modified Tue Aug 29 11:12:56 2006 UTC (13 years, 4 months ago) by dpvc
Allow cmp_compare to return an array of answers, if requested (needed
by parserMultiPart.pl).

Revision 4388 - Directory Listing
Modified Sat Aug 19 23:31:38 2006 UTC (13 years, 5 months ago) by dpvc
Fixed the problem I pointed out at MathFest where some errors were not
being reported in the traditional num_cmp() function.  (Things like
'x+3' in a numeric field would not be reported as an error and x would
be treated as 0).  This is due to a change in version 1.14 when Sam
was normalizing the error reporting code; he didn't notice that warn
had been rerouted to die in PG_answer_eval().  I have replaced it.

Revision 4386 - Directory Listing
Modified Thu Aug 17 23:55:17 2006 UTC (13 years, 5 months ago) by dpvc
Added LaTeXMathML mode.

Revision 4385 - Directory Listing
Modified Wed Aug 16 01:42:46 2006 UTC (13 years, 5 months ago) by dpvc
Report the objec type better in parser error messages.

Revision 4384 - Directory Listing
Modified Wed Aug 16 01:41:02 2006 UTC (13 years, 5 months ago) by dpvc
Fixed spelling errors in error messages.

Revision 4383 - Directory Listing
Modified Wed Aug 16 01:40:06 2006 UTC (13 years, 5 months ago) by dpvc
Fixed a problem where Set objects could incorrectly complain about the
parentheses (braces) used to declare the set.

Revision 4382 - Directory Listing
Modified Wed Aug 16 01:37:28 2006 UTC (13 years, 5 months ago) by dpvc
Fixed a bug where substituting values into a Formula object would not
be cleaned up properly (so later actions could incorrectly include the
same substitution).

Revision 4379 - Directory Listing
Modified Mon Aug 14 18:24:44 2006 UTC (13 years, 5 months ago) by sh002i
allow partial URLs in appletPath -- these get the server_root_url
prepended to them.

Revision 4363 - Directory Listing
Modified Wed Aug 9 14:32:14 2006 UTC (13 years, 5 months ago) by sh002i
append "1;" to these files, to satisfy Apache2.

Revision 4318 - Directory Listing
Modified Sat Jul 29 16:19:18 2006 UTC (13 years, 5 months ago) by gage
Added rungeKutta4  method to PGnumericalmacros.pl   Updated documentation on rungeKutta4a, an answer filter in PGdiffeqmacros.pl

Revision 4301 - Directory Listing
Modified Wed Jul 26 13:23:09 2006 UTC (13 years, 5 months ago) by dpvc
Allow matrices to be created from lists of vectors or points, or from
formulas returning vectors or points.

Revision 4300 - Directory Listing
Modified Wed Jul 26 13:18:25 2006 UTC (13 years, 5 months ago) by dpvc
Fixed a problem with derivatives of constant-valued Matrices (and
vectors and points).  They were incorrectly getting an extra level of
nesting.

Revision 4299 - Directory Listing
Modified Wed Jul 26 12:27:07 2006 UTC (13 years, 5 months ago) by dpvc
Extended the differentiation operator to handle multiple derivatives:

	  $f->D("x","y")    is the same as $f->D("x")->D("y")
	  $f->D(2)          is the same as $f->D->D
	  $f->D(2,"x")      is the same as $f->D("x")->D("x")

and so on.

Revision 4298 - Directory Listing
Modified Wed Jul 26 02:54:01 2006 UTC (13 years, 5 months ago) by dpvc
Extended this context to handle multivariable polynomials.  So you can
use things like

	loadMacros("contextLimitedPolynomial.pl");
	Context("LimitedPolynomial")->variables->are(x => 'Real', y => 'Real');
        Context()->flags->set(singlePowers=>1);
	$f = Formula("1 + x + y + 2xy + x^2 + y^2");

Revision 4275 - Directory Listing
Modified Mon Jul 17 21:12:44 2006 UTC (13 years, 6 months ago) by dpvc
Make FUNCTION_CMP retain the professor's answer exactly as typed
rather than use the parsed version's reconstructed string.

Revision 4181 - Directory Listing
Modified Wed Jun 28 19:15:03 2006 UTC (13 years, 6 months ago) by jj
Fixed bug which caused warnings in problems containing hints and/or solutions
containing math (i.e., requiring images).

Revision 4144 - Directory Listing
Modified Fri Jun 23 22:07:44 2006 UTC (13 years, 6 months ago) by dpvc
Use tolerance flags from the Real object itself, if available, before
looking at the context.

Revision 4143 - Directory Listing
Modified Fri Jun 23 22:06:47 2006 UTC (13 years, 6 months ago) by dpvc
Fix some problems with the Diagonstics output for Formula objects.
(The tolerances using in the diagnostics didn't always match the ones
used in the actual testing, and the wrong values were sometimes
displayed when a multi-variable function was displayed as a graph.)

Revision 4134 - Directory Listing
Modified Mon Jun 19 15:13:33 2006 UTC (13 years, 7 months ago) by dpvc
Fixed grade_problem so taht is uses the safe compartment.  (This is
important because the problem can supply its own grader, and that code
shoudl be run in the safe compartment, just like the answer checkers
are.  Without this, graders could call PG_restricted_eval() and
actually get access to the full WW environment rather than the safe
compartment.)

Revision 4124 - Directory Listing
Modified Wed Jun 7 23:01:44 2006 UTC (13 years, 7 months ago) by gage
Make sure that WeBWorK::Constants has been loaded before this file is evaluated.

Revision 4121 - Directory Listing
Modified Mon Jun 5 20:43:22 2006 UTC (13 years, 7 months ago) by dpvc
Fixed a problem where things like x+4x would be accepted even in
single-power mode (the initial x was not being identified as a single
power of x correctly).

Revision 4098 - Directory Listing
Modified Tue May 23 20:45:02 2006 UTC (13 years, 7 months ago) by gage
Added support for searching for appletin  anumber of places defined in
$pg{directories}{appletPath}  in global.conf

Revision 4093 - Directory Listing
Modified Tue May 23 11:51:55 2006 UTC (13 years, 7 months ago) by dpvc
Fixed a problem where a pick screen error was produced if a student
entered a vector-valued formula rather than a constant vector when
parallel answers are being checked and the student used the Preview
button to submit the answer.

Revision 4088 - Directory Listing
Modified Sun May 21 00:44:40 2006 UTC (13 years, 8 months ago) by gage
added findAppletFile  to dangerous macros.

This is still not in its final form which should involve checking the url
rather than the file location.

Revision 4044 - Directory Listing
Modified Thu Apr 6 00:23:59 2006 UTC (13 years, 9 months ago) by dpvc
Fixed a bug that caused can error when a Complex1 object was passed to
the answer checker (rather than a string that needs to be parsed).

Revision 4043 - Directory Listing
Modified Thu Apr 6 00:20:01 2006 UTC (13 years, 9 months ago) by dpvc
Fixed getFlag so that it sodesn't accidentally create the {context}
field of an object that doesn't already have one (Perl will create
hashes that don't already exist if you reference them).  This was
causing problems with the ans_array processing

Revision 4041 - Directory Listing
Modified Fri Mar 31 22:59:43 2006 UTC (13 years, 9 months ago) by dpvc
A change to the way lists are processed in AnswerChecker.pm in
December (v1.75) requires that implicitList => 0 be added to the
defaults for variable_cmp().

Revision 4028 - Directory Listing
Modified Sat Feb 18 22:42:55 2006 UTC (13 years, 11 months ago) by dpvc
Change check for zero from fuzzy check to strict check (when the
problem used absolute tolerances, in particular, this can causebig
problems).

Revision 3992 - Directory Listing
Modified Mon Jan 30 16:20:09 2006 UTC (13 years, 11 months ago) by dpvc
When checking for division by zero, don't do fuzzy check.

Revision 3971 - Directory Listing
Modified Wed Jan 25 12:47:17 2006 UTC (13 years, 11 months ago) by dpvc
Forward port to HEAD (Prevent "unquoted dx may conflict with future
usage" messages.)

Revision 3915 - Directory Listing
Modified Tue Jan 17 02:20:19 2006 UTC (14 years ago) by dpvc
Fixed problem with formula-valued matrices producing an error message
incorrectly.  (Was checking the wrong attribute of the entries.)

Revision 3913 - Directory Listing
Modified Tue Jan 17 01:56:24 2006 UTC (14 years ago) by dpvc
Fixed problem with variables that are multiplied with no space between
them (e.g., "ax") that was introduced when I changed the pattern to
allow multi-letter variable names.

The solution is to first check against the defined names before
checking for the more complete name pattern.

Revision 3912 - Directory Listing
Modified Fri Jan 13 21:15:19 2006 UTC (14 years ago) by sh002i
changed license and readme to have generic "2.x" version numbers and no
specific readme test. (i may add some message about this being an
unreleased development version or something at a later date.)

Revision 3872 - Directory Listing
Modified Sat Dec 31 16:31:48 2005 UTC (14 years ago) by dpvc
Added ability to supply a code reference (rather than a Value object)
for the typeMatch and extra fields for the List answer checker (and
the String answer checker).  This makes these more useful in
overriding the match for specific problems that want better error
messages, for example.

Revision 3871 - Directory Listing
Modified Sat Dec 31 16:29:29 2005 UTC (14 years ago) by dpvc
Avoid error when a CODE reference is checked to see if it is a Value object.

Revision 3870 - Directory Listing
Modified Sat Dec 31 15:00:37 2005 UTC (14 years ago) by dpvc
Added ability to specify variables that are part of the union/list
rather than requiring just constants.  E.g.,

       interval_cmp("(1,a),(2a-1,a)",unions=>'no',var=>'a');

or

       interval_cmp("(x,y),(2x,3y)",unions=>'no',vars=>['x','y']);

Revision 3869 - Directory Listing
Modified Sat Dec 31 14:57:39 2005 UTC (14 years ago) by dpvc
Added a new flag that controls how a list with a single entry that is
a list is handled.  In the past, the student could not specify such an
item, but now the default is to form a list with a single entry that
is a list, provided the student has used parens explicitly around his
list.  So "1,2" will be a list with two items and "(1,2)" will be a
list with one item (a list).  This improves the ability to use the
list checker for lists of arbitrary pairs (like "(1,max)") especially
when you want to check for lists of these (e.g., "(1,max),(2,min)"),
since otherwise a single pair "(1,max)" entered by the student would
become the list "1,max" rather than the list containing the single
pair.

If you really want "(1,max)" to become the list "1,max", use

   List("1,max")->cmp(implicitList=>0);

to prevent single lists from forming a list of a single item.

Revision 3868 - Directory Listing
Modified Sat Dec 31 02:42:46 2005 UTC (14 years ago) by dpvc
Now that the Parser allows multi-letter variable names, there is no
need to handle C0 specially.

Revision 3867 - Directory Listing
Modified Sat Dec 31 02:41:16 2005 UTC (14 years ago) by dpvc
Now that the parser accepts multi-character variables, there is no
need for the special treatment of dx.  Also, allow the context to
specify the default variable to use, and if not available, take the
LAST varaible alphabetically, not the first.  (x is more likely to be
last, and the author might have added dx as a variable so that it will
not cause an error if used in other answers in the problem, for
example.)

Revision 3866 - Directory Listing
Modified Sat Dec 31 01:39:54 2005 UTC (14 years ago) by dpvc
Allow multi-letter variable names and names like x1, x2, etc.

Revision 3814 - Directory Listing
Modified Wed Dec 14 17:47:00 2005 UTC (14 years, 1 month ago) by sh002i
Really fix fun_cmp equivalence warning message.

We show the equivalence message when: we're not in preview mode AND the
answers are equivalent AND the answers are not identical. We DON'T CARE
whether the answers are correct or not, because that leaks information
in multipart questions when $showPartialCorrectAnswers is off.

Both the Parser-version (FUNCTION_CMP) and the non-Parser-version
(ORIGINAL_FUNCTION_CMP) behave as descibed above now.

And this time we test *before* we commit...

Revision 3812 - Directory Listing
Modified Wed Dec 14 00:51:23 2005 UTC (14 years, 1 month ago) by sh002i
parser version was ok, bug #752 fixed in non-parser version.

Revision 3808 - Directory Listing
Modified Tue Dec 13 18:23:46 2005 UTC (14 years, 1 month ago) by sh002i
give answer is equivalent message regardless of correctness.
fixes bug #752.

Revision 3800 - Directory Listing
Modified Wed Dec 7 16:13:48 2005 UTC (14 years, 1 month ago) by dpvc
Prevent error message when num_cmp specifies the same string more than
once (e.g., upper and lower case versions of the same thing).

Revision 3792 - Directory Listing
Modified Mon Dec 5 16:09:56 2005 UTC (14 years, 1 month ago) by sh002i
Corrected error message when mailing to an address is not allowed. This
used to refer to the courseWeBWorK.ph file, which is WW1-specific. It
now mentions global.conf and course.conf.

Revision 3782 - Directory Listing
Modified Thu Dec 1 13:17:27 2005 UTC (14 years, 1 month ago) by dpvc
Fixed a problem with not including parentheses when a negative number
is the base of a power. (And in general, when a negative is used as an
operand of a higher-precendence operation, but it really only affected
powers.)

Revision 3781 - Directory Listing
Modified Tue Nov 29 21:25:25 2005 UTC (14 years, 1 month ago) by apizer
Add underscores to the anonymous unique identifier for
questionnaires in WW 2 by using
${setNumber}_${courseName}_$psvnNumber

Revision 3769 - Directory Listing
Modified Mon Nov 21 13:13:35 2005 UTC (14 years, 1 month ago) by dpvc
Fixed a problem with formatStudentAnswer not being defined in the
special context created for this answer checker.

Revision 3765 - Directory Listing
Modified Thu Nov 17 22:57:39 2005 UTC (14 years, 2 months ago) by dpvc
Handle the new global.conf setting for jsMath's processDoubleClicks option.

Revision 3763 - Directory Listing
Modified Thu Nov 17 13:21:43 2005 UTC (14 years, 2 months ago) by dpvc
Give better error messages when the entries in Points, Vectors and
Matrices are not of the right type.

Revision 3762 - Directory Listing
Modified Thu Nov 17 13:20:50 2005 UTC (14 years, 2 months ago) by dpvc
Adjusted the parentheses slightly so that matrices will only be formed
in Matrix context, not Point or Vector context (this produced
confusing messages for students in some circumstances where they didn't
balence their parentheses correctly).

Revision 3759 - Directory Listing
Modified Sat Nov 12 01:31:10 2005 UTC (14 years, 2 months ago) by gage
Roll back my changes.  Use Davide's method of detecting the preview Button

Revision 3758 - Directory Listing
Modified Sat Nov 12 00:58:57 2005 UTC (14 years, 2 months ago) by gage
Check to see if $inputs_ref->{previewAnswers} is defined.  If it is then
the preview button has been pressed.  In this case emit a warning if
the answer has been given previously regardless of whether the answer is
correct or incorrect.  The warning message indicates that the previous
matching answer might have been either a preview or a submitted answer.

Let's see how this works.

Revision 3757 - Directory Listing
Modified Sat Nov 12 00:50:07 2005 UTC (14 years, 2 months ago) by dpvc
Take care of the issue where Preview could be used to gather
information about whether an answer is correct by using the "this
answer is the same as the previous one" message.  Now if Preview is
used, the warning is given whether the answer is right or not.

(Maybe it is not necessary to check for correct at all, since that was
there to prevent the message from being issued when there are multiple
answer blanks and the student is working on other ones.  But the exact
match check will take care of those.  Should the message be issued if
the student changes a correct answer to an equivalent one?)

Revision 3756 - Directory Listing
Modified Sat Nov 12 00:34:33 2005 UTC (14 years, 2 months ago) by dpvc
Updated a comment to make it more accurate.

Revision 3755 - Directory Listing
Modified Sat Nov 12 00:31:22 2005 UTC (14 years, 2 months ago) by dpvc
Make had the right idea, but used the wrong context (or what might be
the wrong context in some circumstances).

Revision 3754 - Directory Listing
Modified Sat Nov 12 00:30:31 2005 UTC (14 years, 2 months ago) by dpvc
Roll back Mike's change, since this can cause unwanted error messages
in list comparisons and other situations where the equality check
could compare different types of objects (for example) or where the
comparison could legitimately fail.  We only want to report errors
here when the user-supplied checker code fails.

This change would cause errors to be reported, for example, when the
user (incorrectly) entered a vector one time and then a formula
(correctly) the next time.  When the previous answer is checked against
the current one, this change would report an error rather than
silently ignoring the error, as it should.

Revision 3753 - Directory Listing
Modified Sat Nov 12 00:13:03 2005 UTC (14 years, 2 months ago) by gage
Changes to code checking whether the previous answer is equivalent to the current answer.
In this module additional code was answer to check for errors in the overloaded ==
in case the two Values can't be compared.

In PGanswermacros.pl the filter which handles "parse_previous_answer"
was modified to make sure the context is the same in the previous answer and the current answer.

Revision 3752 - Directory Listing
Modified Sat Nov 12 00:12:54 2005 UTC (14 years, 2 months ago) by gage
Changes to code checking whether the previous answer is equivalent to the current answer.
In this module additional code was answer to check for errors in the overloaded ==
in case the two Values can't be compared.

In PGanswermacros.pl the filter which handles "parse_previous_answer"
was modified to make sure the context is the same in the previous answer and the current answer.

Revision 3735 - Directory Listing
Modified Mon Oct 31 21:19:40 2005 UTC (14 years, 2 months ago) by apizer
Create an anonymous unique identifier for
questionnaires in WW 2 by using
$setNumber$courseName$psvnNumber in place of
$psvnNumber.

Revision 3723 - Directory Listing
Modified Thu Oct 20 00:57:19 2005 UTC (14 years, 3 months ago) by dpvc
A new parser object that handles popup menus.  Mainly this is so that
you can use them with the MultiPart object, which requires all the
objects to be Value objects.  See the comments in the file for
documentation and examples.

Revision 3716 - Directory Listing
Modified Sun Oct 16 03:37:17 2005 UTC (14 years, 3 months ago) by dpvc
In the past, when Value objects were inserted into strings, they would
automatically include parentheses so that if you had $f equal to 1+x
and $g equal to 1-x, then Formula("$f/$g") would mean (1+x)/(1-x)
rather than 1+(x/1)-x, which is what would happen as a straing string
substitution.

The problem is that this would also happen for real numbers, vectors,
and everything else, even when it wasn't necessary.  So if $x=Real(3),
then "Let x = $x" would be "Let x = (3)".

I have changed the behavior of the string concatenation for Value
objects so that parentheses are only added in a few cases: for
Formulas, Complex numbers, and Unions.  This makes the other Value
objects work more like regular variables in strings, but might cause
some problems with strings that are used as formulas.  For example, if
$a = Real(-3), then "x + 2 $a" will become "x + 2 -3", or "x-1" rather
than the expected "x - 6".  (The old approach would have made it "x +
2 (-3)" which would have worked properly).  For the most part, it is
easier to use something like "x + 2*$a" or even "x" + 2*$a in this
case, so the extra trouble of having to avoid parentheses when you
really meant to substitute the value into a string didn't seem worth
it.

Revision 3715 - Directory Listing
Modified Sun Oct 16 03:27:35 2005 UTC (14 years, 3 months ago) by dpvc
Added a new experimental diagonstic function for the function answer
checker.  When enabled, it will produce graphs of the correct answer,
the student answer, and the absolute and relative errors, and will
list the data points used in the comparison, plus the numerical values
of the results and errors.

To enable the diagnostic, use

   ANS(fun_cmp($f,diagnostics=>1));

Note that only single-variable functions can be graphed at the moment,
so if you are using a multi-variable check, you need to disable the
graphing.  To do this use

   ANS(fun_cmp($f,vars=>['x','y'],diagnostics=>[showGraphs=>0]));

The diagnostic mode is only available for the Parser-based versions of
the function checker, and (of course) with the native Parser objects
as well:

   ANS(Formula($f)->cmp(diagnostics=>1));

There are now Context settings to control the diagnostics, which can
be set through Context()->diagnostics->set().  For example

   Context()->diagnostics->set(formulas=>{showGraphs=>0});

would turn off graphs for all functions comparisons.  Some of the
other values you can set are:

   formulas => {
     showTestPoints => 1,        # show the test points and function values
     showRelativeErrors => 1,    # show the relative errors for the student answer
     showAbsoluteErrors => 1,    # show the absolute errors for the student answer
     showGraphs => 1,            # show the various graphs
     graphRelativeErrors => 1,   #  show the relative error graph
     graphAbsoluteErrors => 1,   #  show the absolute error graph
     clipRelativeError => 5,     #  don't show relative errors above 5
     clipAbsoluteError => 5,     #  don't show absolute errors above 5
     plotTestPoints => 1,        #  include dots at the test points
     combineGraphs => 1,         #  show correct and student graphs in one image
   },
   graphs => {
     divisions => 75,       # the number of data points to plot
     limits => [-2,2],      # the lower and upper limit of the plot
                            #  (taken from the function limits if not provided)
     size => 250,           # pixel size of the image (could be [width,height])
     grid => [10,10],       # number of grid lines in each direction
     axes => [0,0],         # where to put axes relative to origin
   }

Any of these can be set in the Context(), or in the answer checker
itself.  If you set diagnostics to an array reference, the entries in
the array refer to element of the formulas hash.  If you set
diagonstics to a hash reference, then you can set values in either the
formulas or graphs hashes, as in:

   ANS(Formula($f)->cmp(diagnostics=>{
     formulas => {showAbsoluteErrors=>0},
     graphs => {size=>300, divisions=>100},
   }));

If you want all function checkers to show diagnostics, use

   Context()->diagonstics->set(formulas=>{show=>1});

The image file names are modified to include the current time so that
the names will be unique.  This avoids problems with the browser cache
showing a old image when a new one has been generated.  But this also
means that the temporary image directory will fill up fast, so you may
need to empty it if you use the diagnostic images frequently.

This is just a first attempt at a diagnostic feature.  I think it will
help when you are not sure if the tolerances are set properly, or if
you think a student answer should be markes correct but isn't, as it
will point out which point(s) are not being accepted.

Revision 3714 - Directory Listing
Modified Sun Oct 16 02:44:34 2005 UTC (14 years, 3 months ago) by dpvc
Modified context data objects to provide a copy method so that the
various types of data can copy themselves (and can provide a more
comprehensive copy if necessary).

Revision 3713 - Directory Listing
Modified Fri Oct 14 23:33:58 2005 UTC (14 years, 3 months ago) by dpvc
Let Parser object's cmp(debug=>1) option set the debug feature of the
answer evaluator.

Revision 3704 - Directory Listing
Modified Tue Oct 11 17:59:30 2005 UTC (14 years, 3 months ago) by jj
Added syntactic sugar for pop_up_lists.

A common situation is that a problem includes a short multiple-choice question along with other answers.  Often, these questions are written as fill-in-the-blank where the student is told a list of legal words to put in the blanks.  The idea is to make it as simple as possible for problem writers to replace the fill-in-the-blank with a drop-down list of alternatives.

So, now the text of a problem can contain

 is the function increasing on [0,1]? \{ pop_up_list(['?', 'yes', 'no']) \}

instead of

 is the function increasing on [0,1]? \{ pop_up_list('?' => '?', 'yes' => 'yes', 'no' => 'no') \}

The result is checked with something like

 ANS(str_cmp('yes'));

Existing problems are unaffected since the added syntax uses a reference to a list (the extra square brackets).

Revision 3703 - Directory Listing
Modified Mon Oct 10 23:47:26 2005 UTC (14 years, 3 months ago) by dpvc
Add a new context flag that controls how the student answer should be
displayed.  The formatStudentAnswer flag can be set to 'evaluated'
(the default), which shows the final numeric answer; 'parsed', which
shows the fully parsed version (including extra parentheses for
clarity); or 'reduced', which performs constant operations, but
doesn't perform function evaluations or named-constant substitutions.

For example, if the student answers 1+2+sqrt(3), then 'evaluated' will
produce  4.73205, 'reduced' will show 3+sqrt(3), and 'parsed' will
show 1+2+sqrt(3).

Revision 3702 - Directory Listing
Modified Mon Oct 10 23:41:05 2005 UTC (14 years, 3 months ago) by dpvc
If constant functions are not being reduced, don't mark the function
call as constant (since otherwise it might be evaluated later accidentally).

Revision 3696 - Directory Listing
Modified Mon Oct 10 12:37:13 2005 UTC (14 years, 3 months ago) by dpvc
Fixed a bug where correct_ans could not be overridden in the cmp()
method for Lists.

Revision 3689 - Directory Listing
Modified Fri Oct 7 02:38:41 2005 UTC (14 years, 3 months ago) by dpvc
Corrected a problem with contexts not being reset properly after
num_cmp or fun_cmp.

Revision 3680 - Directory Listing
Modified Sun Oct 2 12:13:16 2005 UTC (14 years, 3 months ago) by dpvc
Removed unneeded "my" for a varaible that is already local.

Revision 3679 - Directory Listing
Modified Sat Oct 1 01:17:24 2005 UTC (14 years, 3 months ago) by dpvc
Major update to allow ImplicitPlane objects to be created
automatically by the Parser when it sees equal signs.  This makes it
possible to use ImplicitPlanes in Lists.  (Before, when the List was
turned into a Formula returning a List, the equality became a plane
old equality rather than an ImplicitPlane object.)

This is a bit of a hack for now until I can make List and other Value
objects be allowed to have Formulas as their entries rather than turn
into Formulas returning Lists (or whatever type).

Revision 3678 - Directory Listing
Modified Sat Oct 1 01:13:27 2005 UTC (14 years, 3 months ago) by dpvc
Handle the names of entries in Lists and Formulas returning lists
better.  Also do better typechecking on these lists.  Finally, allow
better typechecking for String objects that are being used when a
Formula answer is allowed.

Revision 3677 - Directory Listing
Modified Sat Oct 1 01:10:27 2005 UTC (14 years, 3 months ago) by dpvc
Allow context to override object class used to create formula objects
(so that things like ImplicitPlane can create instances of themselves
automatically when needed).

This mechanism needs to be enlarged to encompass the other Value
object classes as well (like the Context()->{parser}{...} hash).

The real problem is that the List object probably shouldn't create a
formula returning a list when it is passed formulas, since there
really isn't much need for a formula returning a list to be
autogenerated (you can create one by hand using Formula if needed).

Right now, ALL the Value objects make themselves into Formulas when
one of their entries is a formula.  For example, Point(1,"x") produces
the same thing as Formula("(1,x)"), and List(1,"x") is the same as
Formula("1,x").  This is good for points, but not so good for lists.
And it might sometimes be nice to have a Vector of Formulas, or a
Matrix with Formula entries (rather than Formulas returning Vectors or
Matrices).  But this would require some serious changes internally in
the Value objects, which make assumptions about their values being
constant.  Changing that will be for another day...

Revision 3676 - Directory Listing
Modified Sat Oct 1 00:59:06 2005 UTC (14 years, 3 months ago) by dpvc
Correctly create Formula returning List when a list has formula
entries.

Revision 3670 - Directory Listing
Modified Thu Sep 29 22:08:43 2005 UTC (14 years, 3 months ago) by dpvc
Only add the 'dx' variable if it isn't already in the context.

Revision 3669 - Directory Listing
Modified Thu Sep 29 22:02:07 2005 UTC (14 years, 3 months ago) by dpvc
Fixed a problem with the automatic upgrading of object classes for
when Value objects are subclassed but are not entered into the
precedence list.

Revision 3662 - Directory Listing
Modified Wed Sep 28 20:40:20 2005 UTC (14 years, 3 months ago) by dpvc
Fixed a bug where if you specified a variable other than dx, the
division by zero check didn't work properly.

Revision 3661 - Directory Listing
Modified Wed Sep 28 11:11:29 2005 UTC (14 years, 3 months ago) by dpvc
Fixed typo in comments.

Revision 3655 - Directory Listing
Modified Mon Sep 26 04:11:25 2005 UTC (14 years, 3 months ago) by gage
Changed the numerical values of lbf to make it more accurate (assuming that lbf is an abbreviation for ft-lbs which I doubt).

Also replaced the conversion factor for pounds with a more accurate figure.

Revision 3654 - Directory Listing
Modified Sat Sep 24 02:38:19 2005 UTC (14 years, 3 months ago) by dpvc
Updated to be able to handle empty anwswer blanks.  There is a new
parameter for the MultiPart object (allowBlankAnswers) that controls
whether the checker routine will be called even when there are blank
entries (normally, the checker is not called unless all the entries
are non-blank).  Use

  $mp = MultiPart(1,2)->with(checkTypes=>0,allowBlankAnswers=>0);

to have the checker routine called when answers are left blank.

You can now also include blank answers in the list itself:

  $mp = MultiPart(1,2,"");

(there is no need to include allowBlankAnswers in this case, because
the blank string will take care of itself.

Revision 3652 - Directory Listing
Modified Sat Sep 24 00:47:30 2005 UTC (14 years, 3 months ago) by dpvc
Added ability to have answers that are empty strings.  String("") now
will produce a valid string object regardless of the Context's defined
string values.  (You can prevent this using

       Context()->flags->set(allowEmptyStrings=>0);

if you wish).  String("")->cmp will produce an answer checker for an
empty string (it removes the blank checker that WW installs).

Revision 3638 - Directory Listing
Modified Mon Sep 19 00:58:35 2005 UTC (14 years, 4 months ago) by dpvc
Fixed bug where str_cmp("0") was changing the correct answer to "",
making it impossible to get correct.

Revision 3637 - Directory Listing
Modified Mon Sep 19 00:16:24 2005 UTC (14 years, 4 months ago) by dpvc
Prevent the empty list from having open and close be set to 'start'
(a value used internally).

Revision 3633 - Directory Listing
Modified Sat Sep 17 13:22:52 2005 UTC (14 years, 4 months ago) by dpvc
Don't allow wrapping in label for ans_array errors.

Revision 3632 - Directory Listing
Modified Sat Sep 17 13:22:19 2005 UTC (14 years, 4 months ago) by dpvc
Improved layout and labeling of error messages.

Revision 3631 - Directory Listing
Modified Sat Sep 17 13:02:24 2005 UTC (14 years, 4 months ago) by dpvc
The Parser answer checkers used to give the student answer as the
parsed but unevaluated answer.  This has been changed so that the
student answer is now the computed result, no the parsed answer.
The answer preview still shows the parsed equation.  This is more
consistent with the traditional answer checkers, and probably is more
valuable to the students.

Revision 3630 - Directory Listing
Modified Sat Sep 17 12:39:09 2005 UTC (14 years, 4 months ago) by dpvc
Better error messages for unreduced unions.

Revision 3629 - Directory Listing
Modified Sat Sep 17 12:25:38 2005 UTC (14 years, 4 months ago) by dpvc
Improved error message layout and labeling for when ans_array is used.

Revision 3628 - Directory Listing
Modified Sat Sep 17 12:22:25 2005 UTC (14 years, 4 months ago) by dpvc
Improved error messages for formulas returning infinity

Revision 3616 - Directory Listing
Modified Tue Sep 13 16:24:21 2005 UTC (14 years, 4 months ago) by dpvc
Fixed problem with recognizing MINF in NUM_CMP.

Revision 3615 - Directory Listing
Modified Tue Sep 13 14:07:32 2005 UTC (14 years, 4 months ago) by dpvc
The ORIGINAL_NUM_CMP was calling str_cmp as a code reference rather
than as the more modern AnswerEvaluator object.  This causes error
messages when string answers were used.  It now uses the evaluate()
method of the AnswerEvaluator.

Revision 3613 - Directory Listing
Modified Mon Sep 12 23:28:37 2005 UTC (14 years, 4 months ago) by dpvc
Fixed an error where scalar() was used on a hash ref.
Fixed a misfeature where operations on formulas could return Value
objects of other classes; they should always return formulas, even
when the formula is constant.

Revision 3612 - Directory Listing
Modified Mon Sep 12 20:26:01 2005 UTC (14 years, 4 months ago) by dpvc
Avoid undefined value of $name.

Revision 3603 - Directory Listing
Modified Wed Sep 7 01:10:58 2005 UTC (14 years, 4 months ago) by dpvc
Added support for cplx_cmp() using the Parser.  Move
lib/Parser/Legacy/PGcomplexmacros.pl to the pg/macros directory to use
it.  As with the other legacy macros, $useOldAnswerMacros can be
controlled to determine whether the new or the old macros are used.

There is a new mode 'strict_cartesian' that is parallel to
'strict_polar'.  You must enter a+bi form, but the a and b can have
operations within them.

Revision 3602 - Directory Listing
Modified Wed Sep 7 01:06:13 2005 UTC (14 years, 4 months ago) by dpvc
Added "strict" versions of the limited complex contexts that don't
allow operations within the real and imaginary parts.  Also cleaned up
some of the code and fixed a few situations that had been missed
before.

Note that in strict mode, e^(pi i) is accepted, but e^(pi/2 i) is
not.  Should that be changed?  It would be possible to make a context
in which a*e^(b*pi/c i) is accepted.

Revision 3601 - Directory Listing
Modified Tue Sep 6 21:02:05 2005 UTC (14 years, 4 months ago) by dpvc
Movified the copying of functions from Complex1:: into main:: to avoid
conflicts with the PGcommonFunctions.pl versions (these errors were
trapped, but still show up in the error log unnecessarily).

Also commented out some code that was not doing anything other than
producing error messages in the error log.  (It was left over from a
syntax check on the professor's answer, but the actual check was
removed, leaving a portion that tries to process the answer, but
usually fails (because things like "1+4i" need to be converted to
"1+4*i" before they can be used in PG_answer_eval, but that was not
being done).

Because of this, it is not possible currently to do cplx_cmp("1+4i"),
and instead you must to cplx_cmp(new Complex(1,4)).

To fix this, you would need to call check_syntax (and the other
filters that are called on the student's answer) before calling
PG_answer_eval.  Of course, you should only do this when the
professor's answer isn't already a Complex object.

I am going to work on a Legacy module like the ones for num_cmp and
fun_cmp to replace cplx_cmp, which should avoid these problems and
make the changes suggested above unnecessary.

Revision 3596 - Directory Listing
Modified Fri Sep 2 22:29:59 2005 UTC (14 years, 4 months ago) by dpvc
Fixed error in atan2 where second argument was not promoted to a Real.

Revision 3591 - Directory Listing
Modified Tue Aug 30 12:21:36 2005 UTC (14 years, 4 months ago) by dpvc
The perl method for UOP and BOP now put spaces around the operator, to
prevent Perl from thinking that things like -e is a file test and
*Parser::Function->call is a name reference.  (Some of these had been
done by hand earlier, but now the base BOP and UOP classes handle it,
so we should not have problems in the future).  I removed the ad hoc
fixes from several other locations (Parser/Function.pm,
Parser/Context/Default.pm).

Also extended the operator definitions to allow operators to create
function-call syntax in perl mode (for when the operator doesn't
correspond to a perl operator).

Revision 3589 - Directory Listing
Modified Tue Aug 30 00:44:53 2005 UTC (14 years, 4 months ago) by dpvc
Added the ability to put class-specific answer-checker defaults into
the Context object.  For example,

    Context("Vector")->{cmpDefaults}{Vector}{promotePoints} = 1;

would make all Vector answer checkers include promotePoints=>1
automatically.  (Note however that if a subclass of Vector is used, it
will not get this defaults, since its class name would be different.
Perhaps something more sophisticated will be needed in the future.)

Revision 3588 - Directory Listing
Modified Tue Aug 30 00:41:34 2005 UTC (14 years, 4 months ago) by dpvc
Added a parserCustomization.pl file that is loaded whenever the
Parser.pl file is.  This can be used on a course-by-course basis to
customize features of the Parser.  Some examples are listed in the
file.

You need to be VERY careful when doing this, as this will affect ALL
problems that use the Parser.  Your changes may cause some .pg files
to fail if they rely on the default behavior that you are changing.

If you wish to override settings in one of the predefined contexts
(like "Vector"), then define $context{Vector} as a copy of
$Parser::Context::Default::context{Vector}, as in the commented out
examples.  Then Context("Vector") will use your copy rather than the
original.  If you were to change the version in
Parser::Context::Default, that would change the parser for ALL
courses, not just yours.

Revision 3587 - Directory Listing
Modified Tue Aug 30 00:36:55 2005 UTC (14 years, 4 months ago) by dpvc
Added a Point context that is a copy of the Vector context.  This will
allow users to override some settings in Vector context (namely, how
they are entered and displayed) without preventing users from being
able to enter points (in Point context).

Revision 3578 - Directory Listing
Modified Fri Aug 26 14:06:39 2005 UTC (14 years, 4 months ago) by jj
Fix bug where perl functions which may need parentheses by forcing them
when the function starts Parser::Function->.  This seems to work, but
there might be a better way to do it, or need other cleaning up.

Revision 3577 - Directory Listing
Modified Fri Aug 26 04:19:09 2005 UTC (14 years, 4 months ago) by jj
When making on-the-fly image names, replace periods in the student login
name to avoid problems with pdflatex.  Changed the replacement in set
names to use the same new trick (the old way had an infintesimal chance
of collision).  The new scheme is first double all instances of "Q".  Then
replace periods with "-Q-".

Revision 3576 - Directory Listing
Modified Thu Aug 25 20:01:25 2005 UTC (14 years, 4 months ago) by glarose
Add some electrical units.  Take two, hopefully in the correct branch
this time.

Revision 3574 - Directory Listing
Modified Thu Aug 25 18:32:01 2005 UTC (14 years, 4 months ago) by jj
Updated instructions to match changes to global.conf.dist and the move
or PGanswermacros.pl.

Revision 3573 - Directory Listing
Modified Thu Aug 25 18:24:55 2005 UTC (14 years, 4 months ago) by jj
A separate copy of this file is no longer needed.

Revision 3572 - Directory Listing
Modified Thu Aug 25 18:21:21 2005 UTC (14 years, 4 months ago) by jj
This makes the pg/lib/Parser/Legacy copy of PGanswermacros.pl the
official copy here.  This still leaves the original answer evaluators as
the default, but simplifies the update process, and we don't have to
maintain two copies of the original functions.

Revision 3569 - Directory Listing
Modified Thu Aug 25 03:40:44 2005 UTC (14 years, 4 months ago) by dpvc
Fixed problem with Context's not properly initializing themselves with
the WW environment parameters (like zeroLevelTol and useBaseTenLog).
The copy method and the method that did an initialized copy used to be
separate routines, but that turned out to be unnecessary, so they have
now been merged (copy always tries to initialize the WW values when it
can, and when the copied context doesn't already have them).

The reason this is complicated is that a number contexts are set up
before the global.conf data is available, so these can't be
initialized with the WW values.  Also, these default contexts are
stored in the persistant processes, and we don't want to leave
possibly course-specific values lying around in them, so whenever a
context is selected, it is copied from the standard version and the
WW parameters are inserted into it.  The problem author can only
modify the copy, not the original, so this is OK with mod_perl.

The context's copy method now always tries to initialize (we used to
have to call initCoopy to get a copy that has the WW parameters
inserted).  That turned out to cause trouble with code that handled
contexts without the usual Context() command.

Revision 3568 - Directory Listing
Modified Thu Aug 25 03:32:16 2005 UTC (14 years, 4 months ago) by dpvc
Fixed log and log10 perl methods so that log obeys the useBaseTenLog
flag, and log10 doesn't try to call main::log10, which is not
available from within this preloaded package.  The in- and outside
the safe compartment stuff is very confusing, and functions that are
not overloaded native perl functions seem to be not callable from the
Value::Formula package, so the perl method now calls
Parser::Function->call() directly (doesn't look pretty, but I've given
up on that).

Revision 3566 - Directory Listing
Modified Thu Aug 25 00:35:18 2005 UTC (14 years, 4 months ago) by dpvc
In order to overcome an MSIE bug that affects jsMath, the call is
changed from jsMath.ProcessBeforeShowing() to jsMath.wwProcess(),
which is added by the jsMath-ww.js file.  (This routine uses an onload
handler for MSIE to put off the processing until MSIE can handle it
properly, but allows all others to do it at the usual time.)

Revision 3562 - Directory Listing
Modified Wed Aug 24 19:07:10 2005 UTC (14 years, 4 months ago) by dpvc
Changed stringify to check for an answer that is zero by using the
zeroLevelTol value directly (rather than use the fuzzy equality check
for zero, which depends on the tolType in a bad way).

Revision 3560 - Directory Listing
Modified Wed Aug 24 11:44:49 2005 UTC (14 years, 4 months ago) by dpvc
Made relative tolerances the default for when the tolType is not one
of 'relative' or 'absolute'.

Revision 3557 - Directory Listing
Modified Wed Aug 24 01:35:01 2005 UTC (14 years, 4 months ago) by jj
Hopefully fixed the logic of setting numerical tolerance defaults.

Revision 3556 - Directory Listing
Modified Tue Aug 23 23:59:46 2005 UTC (14 years, 4 months ago) by jj
Fixed problem with display_matrix_mm so its behaviour matches its
documentation.  This may break problems which relied on its previous
incorrect behavior.

Revision 3555 - Directory Listing
Modified Tue Aug 23 23:57:01 2005 UTC (14 years, 4 months ago) by dpvc
Use a default for the zeroLevelTol set in the current context.

Revision 3554 - Directory Listing
Modified Tue Aug 23 23:10:02 2005 UTC (14 years, 4 months ago) by jj
Deleted commented out line (which had been used for debugging).

Revision 3553 - Directory Listing
Modified Tue Aug 23 22:56:50 2005 UTC (14 years, 4 months ago) by jj
This adds wiring to the pg side for special bits of html to be included before/after the body of a problem.  You also need to update global.conf (and probably want to update Tasks.pm).

A commented out example in global.conf.dist shows how to use this to produce boxed problems a la the Union College server.  In this approach, the added parts are not used for problems rendered in the Library Browser or Problem Set Detail.

This addresses bug 817.  This solution may not be suitable for inclusion of needed bits for modes such as asciimath or tth because the those bits of html are probably needed for display in the Library Browser.  It is hard to distinguish bits which are always wanted, and those which are only wanted for use by Problem.

Revision 3547 - Directory Listing
Modified Mon Aug 22 01:26:04 2005 UTC (14 years, 4 months ago) by jj
Part of change dealing with bug 813.

Possible things still to do here:
   change names of variables to reflect that they contain commands and
     not scripts
   have a variable for the path to cat
   remove the scripts themselves

Revision 3544 - Directory Listing
Modified Sun Aug 21 21:46:49 2005 UTC (14 years, 4 months ago) by jj
Removed bits which were accidentally included during last commit.

Revision 3543 - Directory Listing
Modified Sun Aug 21 18:12:30 2005 UTC (14 years, 4 months ago) by jj
Should fix bug 696 by replacing consecutive whitespace with a single
space for answers in an individual ans_rule.

Revision 3540 - Directory Listing
Modified Sun Aug 21 05:21:07 2005 UTC (14 years, 5 months ago) by jj
level_curve_check now forces the use of the old style (not Parser::Legacy)
answer evaluators resolving bug 820.

Revision 3539 - Directory Listing
Modified Sun Aug 21 00:04:40 2005 UTC (14 years, 5 months ago) by dpvc
Updated to handle jsMath version 2.

Revision 3536 - Directory Listing
Modified Sat Aug 20 23:07:13 2005 UTC (14 years, 5 months ago) by dpvc
Added code to handle the case where the professor's answer is in
expondential notation using a little e instead of a big one.  (Perl
will convert .0000001 to 1E-07, for example, before it is passed to
num_cmp.)

Revision 3531 - Directory Listing
Modified Mon Aug 15 22:42:37 2005 UTC (14 years, 5 months ago) by dpvc
Fixed more undefined values

Revision 3529 - Directory Listing
Modified Mon Aug 15 01:50:21 2005 UTC (14 years, 5 months ago) by dpvc
Changed Context() call to direct reference to context, so as not to
leave the wrong content selected as the current one.

Revision 3525 - Directory Listing
Modified Sun Aug 14 00:23:10 2005 UTC (14 years, 5 months ago) by dpvc
Added methods for testing containment of one set in another, and so
on.  These include:

     $A->contains($B)        Test if $B is a subset of $A (or an
                             element of $A if $B$ is a real number).

     $A->isSubsetOf($B)      Test if $A is a subset of $B.

     $A->isEmpty             True if $A is the empty set.

     $A->intersects($B)      True if $A and $B have numbers in common.

     $A->intersect($B)       The set of numbers common to both $A and $B.

Be careful of the difference between "intersect" and "intersects".
One is a set the other a true/false value.

Revision 3524 - Directory Listing
Modified Sun Aug 14 00:18:46 2005 UTC (14 years, 5 months ago) by dpvc
Added a copy method that produces a deep copy of the given object.
This probably should be used through the new() methods to ducplicate
the data used when creating an object, otherwise changes to the
sub-objects will cause changes to the outer one.  For example, if an
interval is used to create a union and then the internal data for the
interval is changed by hand, the changes will also occur in the
union.  That is, Value objects contain their data by REFERENCE.  This
should probably be changed, but fortunately, no one should be
adjusting the internal structure of the objects by hand.

Revision 3523 - Directory Listing
Modified Sat Aug 13 22:38:39 2005 UTC (14 years, 5 months ago) by dpvc
Added canBeInUnion and isSetOfReals methods to the Parser package
(similar to the ones in the Value package), replacing the
canBeInterval flag and other ad hoc checks.

Removed ability to form interval like [a] now that we have sets.

Revision 3522 - Directory Listing
Modified Sat Aug 13 22:34:31 2005 UTC (14 years, 5 months ago) by dpvc
Maintain parentheses correctly when converting to perl.

Revision 3520 - Directory Listing
Modified Sat Aug 13 21:45:46 2005 UTC (14 years, 5 months ago) by jj
Implimentation of COMMENT for comments to appear in the library browser.

Revision 3518 - Directory Listing
Modified Sat Aug 13 21:34:50 2005 UTC (14 years, 5 months ago) by dpvc
Allow a list of numbers to be converted to a set.

Revision 3517 - Directory Listing
Modified Sat Aug 13 21:31:46 2005 UTC (14 years, 5 months ago) by dpvc
Pass the canBeInUnion call on to the Formula's root node

Revision 3516 - Directory Listing
Modified Sat Aug 13 20:59:28 2005 UTC (14 years, 5 months ago) by dpvc
Added isSetOfReals and canBeInUnion methods to the Value objects, and
replaced the ad hoc tests for these conditions to call these
routines.

Cleaned up the make() methods for Intervals, Sets and Unions, and
improved the new() methods to handle more cases better.

Fixed Value::makeValue() to handle an array reference correctly.

I don't THINK any of this will break anything.  :-)

Revision 3515 - Directory Listing
Modified Sat Aug 13 20:55:35 2005 UTC (14 years, 5 months ago) by dpvc
Make formulas that produce lists get default open and close parens,
and have them retained in Formula() results.

Revision 3514 - Directory Listing
Modified Sat Aug 13 19:10:41 2005 UTC (14 years, 5 months ago) by dpvc
Make sure the singletons are sorted before comparing them to the
intervals (and each other).

Revision 3513 - Directory Listing
Modified Sat Aug 13 18:51:54 2005 UTC (14 years, 5 months ago) by jj
Fixed treatment of options in setting the mode and optional parameters
related to reducing unions.

Revision 3512 - Directory Listing
Modified Sat Aug 13 18:19:01 2005 UTC (14 years, 5 months ago) by dpvc
Can't use the length check when reducing unions, since it could
contain a single set that is not reduced, and we need to check that,
too.

Revision 3511 - Directory Listing
Modified Sat Aug 13 17:50:11 2005 UTC (14 years, 5 months ago) by dpvc
Fixed reduction warnings for individual sets, intervals and unions (in
making it work for lists, I broke it for the single items).

Revision 3510 - Directory Listing
Modified Sat Aug 13 17:32:58 2005 UTC (14 years, 5 months ago) by dpvc
Fixed a problem with redefine when used with classes that store their
data in a on-standard form (i.e., by overridding the create()
method).  Now they can define uncreate() to get the original data back
for use with redefine().

Revision 3509 - Directory Listing
Modified Sat Aug 13 17:24:00 2005 UTC (14 years, 5 months ago) by dpvc
Fixed mad error message (change needed due to new message translation
facility).

Revision 3508 - Directory Listing
Modified Sat Aug 13 16:58:56 2005 UTC (14 years, 5 months ago) by dpvc
Added isReduced method to tell if a Union, Set or Interval is already
reduced.  Fixed up sort to use CORE::sort, and added sort and reduce
to Intervals, which do nothing, but are there for consistency.

Revision 3507 - Directory Listing
Modified Sat Aug 13 16:57:14 2005 UTC (14 years, 5 months ago) by dpvc
Fixed error in testing is a union is reduced (didn't test if sets
within a union were reduced properly).

Revision 3506 - Directory Listing
Modified Sat Aug 13 16:47:23 2005 UTC (14 years, 5 months ago) by jj
Moved a chunk of duplicated code to its own function, and tweaked the setting
of the context in a few cases.

Revision 3505 - Directory Listing
Modified Sat Aug 13 16:33:50 2005 UTC (14 years, 5 months ago) by dpvc
Added sort methods to Union and Set that return objects with their
data sorted.

Revision 3504 - Directory Listing
Modified Sat Aug 13 15:57:17 2005 UTC (14 years, 5 months ago) by dpvc
Moved the union and set reduction checks from cmp_equal to cmp_compare
so that the messages can be produced even in lists of unions.

Improved the message facilities for the list comparison so that
cmp_compare can make errors that refer to the number of the entry in
the student's answer (otherwise an extra "There was a problem with
your nth value" message needs to be prepended, which looks bad if it
can be avoided).

Use the "extra" answer checker to report syntax error messages in unordered
lists.

Revision 3503 - Directory Listing
Modified Sat Aug 13 15:44:41 2005 UTC (14 years, 5 months ago) by dpvc
Fixed problem with call to $equation->Error (due to change in
error-handling that allows for translation of error messages).

Revision 3502 - Directory Listing
Modified Sat Aug 13 05:54:10 2005 UTC (14 years, 5 months ago) by jj
If a problem file sets $refreshCachedImages=1 inside the pg file, then
cached copies of on the fly graphics are ignored and the graphic is
regenerated.

Revision 3501 - Directory Listing
Modified Sat Aug 13 01:40:45 2005 UTC (14 years, 5 months ago) by dpvc
Added differentiation of (single-variable) functions created with
parserFunction.

Revision 3500 - Directory Listing
Modified Sat Aug 13 01:39:14 2005 UTC (14 years, 5 months ago) by dpvc
Fixed typo in previous update.

Revision 3499 - Directory Listing
Modified Sat Aug 13 00:41:24 2005 UTC (14 years, 5 months ago) by dpvc
Added sets to the differentiation information (no derivatives allowed)

Revision 3498 - Directory Listing
Modified Sat Aug 13 00:35:11 2005 UTC (14 years, 5 months ago) by dpvc
Fixed a typo in an error message.

Revision 3497 - Directory Listing
Modified Sat Aug 13 00:25:27 2005 UTC (14 years, 5 months ago) by dpvc
Added ability for Unions and Sets to simplify themselves
(automatically or on demand), and added flags to the Context and
answer checkers to control these features.  The new Context flags
are

    reduceUnions                tells whether unions are automatically
                                reduced when they are created.

    reduceUnionsForComparison   tells whether unions are reduced
                                before comparing them for equality
                                or inequality (etc) if they aren't
                                reduced already.

    reduceSets                  tells whether redundent elements are
                                removed from sets as they are created.

    reduceSetsForComparison     tells whether sets are reduced before
                                comparing them.

All of these default to true.

The Interval, Set, Union, and List answer checkers not have two new
flags for controlling these values:

    studentsMustReduceUnions    tells whether unions and sets will be
                                counted as incorrect when they are not
                                reduced to non-overlapping intervals
                                and at most one set with no repeated
                                entries.

    showUnionReduceWarnings     tells whether an error message will
                                be produced for non-reduced unions and
                                sets, or if they will be marked wrong
                                silently.  (Not available in Lists.)

Both of these are true by default, since most professors probably want
their students to write intervals in reduced form.  (Is this true?)
This corresponds the the current behavior of the interval checkers,
which require the student's answer to be the same set of intervals as
in the professor's, but with the addition of an error message when the
student answer is not reduced.

Revision 3495 - Directory Listing
Modified Fri Aug 12 23:21:52 2005 UTC (14 years, 5 months ago) by dpvc
Fixed use of undefined value for $position in TeX and String methods.

Revision 3494 - Directory Listing
Modified Fri Aug 12 23:02:11 2005 UTC (14 years, 5 months ago) by dpvc
Made the 'R' constant in Interval context show up as a bold R in TeX
mode.

Revision 3493 - Directory Listing
Modified Fri Aug 12 22:56:04 2005 UTC (14 years, 5 months ago) by dpvc
Detect preview mode correctly for either WW1 or WW2.

Revision 3492 - Directory Listing
Modified Fri Aug 12 22:55:19 2005 UTC (14 years, 5 months ago) by dpvc
Adjust spacing.

Revision 3491 - Directory Listing
Modified Fri Aug 12 22:54:38 2005 UTC (14 years, 5 months ago) by dpvc
Mark function as constant if it is.

Revision 3489 - Directory Listing
Modified Fri Aug 12 18:43:25 2005 UTC (14 years, 5 months ago) by jj
Completed conversion of interval_cmp to use Parser objects.  Also, minor
updates to number_list_cmp.

Revision 3488 - Directory Listing
Modified Fri Aug 12 17:40:07 2005 UTC (14 years, 5 months ago) by dpvc
Avoid problem with undefined value being passed to protectHTML.

Revision 3487 - Directory Listing
Modified Fri Aug 12 17:09:42 2005 UTC (14 years, 5 months ago) by dpvc
Changed how Intervals implement the requireParenMatch flag for the
interval and union answer checker.  (Use a Context flag rather than a
flag on the interval itself.)  Moved the getFlag method from
Formula.pm to Value.pm so it can be used by any object class.  New
feature where classes can add more context flags to set (and reset
after the answer checker runs).

Revision 3484 - Directory Listing
Modified Fri Aug 12 01:26:11 2005 UTC (14 years, 5 months ago) by dpvc
Removed erroneous dollar sign.

Revision 3483 - Directory Listing
Modified Fri Aug 12 01:21:48 2005 UTC (14 years, 5 months ago) by dpvc
Added redefine() function to complement undefine() for various
Context() values.  For example

      Context()->operators->undefine('+');

makes '+' undefined, but

      Context()->operators->redefine('+');

will put it back.  You can specify a context from which to take the
redefinition, and a name in that context, as in

      Context()->operators->redefine('U',from=>"Interval");
      Context()->operators->redefine('u',from=>"Interval",using=>"U");
      Context()->operators->redefine('U',from=>$content);

where $content is a reference to a Context object.

The undefine() function lets you undefine several items at once, as in

      Context()->operators->undefine('+','-');

For redefine, you must put multiple names in square brackets because
of the optional parmeters:

      Context()->operators->redefine(['+','-']);

Revision 3482 - Directory Listing
Modified Fri Aug 12 01:15:30 2005 UTC (14 years, 5 months ago) by dpvc
Fixed bug with missing fields in initialization.

Revision 3477 - Directory Listing
Modified Thu Aug 11 20:57:18 2005 UTC (14 years, 5 months ago) by dpvc
Added ability to subtract intervals, sets and unions.  Adjusted the
precedence of the union 'U' to be above _ and + so that things like
(1,5) U (7,10) - {8} U (2,3) will do ((1,5) U (7,10)) - ({8} U (2,3))
rather than the previous (1,5) U ((7,10) - {8}) U (2,3).  Finally,
added a constant 'R' to the Interval context that is equivalent to
(-inf,inf), so you can do things like R-{0} now.

Still need to work out reducing unions so that things like (1,3)U(2,4)
can become (1,4).

Revision 3474 - Directory Listing
Modified Thu Aug 11 14:37:18 2005 UTC (14 years, 5 months ago) by dpvc
Changes needed for new Set object, plus for moving string, TeX and
perl into Value.pm.  Also removed unneeded spaces in perl versions of
the constants (these were to fix problems with the minus sign, but
that is now being handled by the minus operators themselves).

Revision 3473 - Directory Listing
Modified Thu Aug 11 14:34:24 2005 UTC (14 years, 5 months ago) by dpvc
Changes needt for Set object, and fixed a bug with unions containing
constant intervals with non-constant ones.

Revision 3472 - Directory Listing
Modified Thu Aug 11 14:33:09 2005 UTC (14 years, 5 months ago) by dpvc
Changes needed to Set object.  Also, use Parser to handle unions
defined as strings rather than doing it by hand (that's the whole
point, isn't it?).  Added object promotion from lower-precedence
classes (for better error messages), and fixed up the comparison
routine.

Revision 3471 - Directory Listing
Modified Thu Aug 11 14:28:07 2005 UTC (14 years, 5 months ago) by dpvc
Changes needed for Set object, better handling of an interval given as
a string, and a few misc. fixes.

Revision 3470 - Directory Listing
Modified Thu Aug 11 14:25:53 2005 UTC (14 years, 5 months ago) by dpvc
Changes needed for new Set object, and moving of string, TeX and perl
methods to Value.pm

Revision 3469 - Directory Listing
Modified Thu Aug 11 14:23:16 2005 UTC (14 years, 5 months ago) by dpvc
Added changes needed for the new Set object.

Revision 3468 - Directory Listing
Modified Thu Aug 11 14:22:36 2005 UTC (14 years, 5 months ago) by dpvc
Added in the Set object class.  Also made more comprehensive defaults
for string, TeX and perl output, so these don't have to be subclassed
so often.  These handle looking up the open and close parens and
recursively handling the entries in a list-type object.

Revision 3467 - Directory Listing
Modified Thu Aug 11 14:20:31 2005 UTC (14 years, 5 months ago) by dpvc
Properly maintain open and close parens in emtpy lists.

Revision 3466 - Directory Listing
Modified Thu Aug 11 14:19:26 2005 UTC (14 years, 5 months ago) by dpvc
Added new Set object class to the Parser.  It implements a finite set
of real numbers, for use with unions and intervals.  E.g., (1,2) U {3}
or (1,2) U {3,4,5}.  You can created Set objects in your perl code via
the Set() command, e.g, Set(3,4,5) or Set("{1,2,3}").  You should set
the Context to Context("Interval") if you plan to use Set objects, as
this defined the braces to form sets (rather than using them as
parentheses, which is the default WW behavior).  Note that in Interval
context, you can NOT use braces as parentheses.

Current, Set objects are only allowed to be sets of numbers.  It would
be possible to extend that in the future.

Revision 3465 - Directory Listing
Modified Thu Aug 11 00:38:33 2005 UTC (14 years, 5 months ago) by dpvc
Make upper-case alias a hidden one (since it is not needed for the
pattern).

Revision 3464 - Directory Listing
Modified Thu Aug 11 00:37:35 2005 UTC (14 years, 5 months ago) by dpvc
Dereference aliases to aliases properly.

Revision 3463 - Directory Listing
Modified Wed Aug 10 23:05:41 2005 UTC (14 years, 5 months ago) by jj
Default behavior of number_list_cmp set to be backward compatible
(no hints of any kind or partial credit).  These features can now be
activated by optional arguments.

Also improvements on parser-based interval_cmp.

Revision 3462 - Directory Listing
Modified Wed Aug 10 18:57:17 2005 UTC (14 years, 5 months ago) by jj
Hopefully improved some of how the temporary context is set for number_list_cmp.
Many whitespace changes (spaces to tabs).  Work in progress for a version of
interval_cmp which uses Parser, temporarily called interval_cmp2.

Revision 3460 - Directory Listing
Modified Wed Aug 10 15:07:12 2005 UTC (14 years, 5 months ago) by dpvc
Interval (and Union) checker now accepts requireParenMatch flag for
deciding whether the interval type must match.  Setting
requireParenMatch to 0 will let (1,2) match (1,2] or [1,2], etc.

Revision 3459 - Directory Listing
Modified Wed Aug 10 15:05:34 2005 UTC (14 years, 5 months ago) by dpvc
Cosmetic change.

Revision 3458 - Directory Listing
Modified Wed Aug 10 14:28:59 2005 UTC (14 years, 5 months ago) by dpvc
The Parser versions of num_cmp and fun_cmp incorrectly left the
current Context set to the base context used by the answer checker.
The Context is now correctly reset to the one in effect before the
call to num_cmp or fun_cmp.

Also removed some redundant values in if-then checks.

Revision 3457 - Directory Listing
Modified Wed Aug 10 14:22:48 2005 UTC (14 years, 5 months ago) by dpvc
Enable commas when mode=>"frac" is specified.

Revision 3455 - Directory Listing
Modified Mon Aug 8 15:56:09 2005 UTC (14 years, 5 months ago) by jj
Changed number_list_cmp to use Parser.

Revision 3446 - Directory Listing
Modified Mon Aug 1 15:14:20 2005 UTC (14 years, 5 months ago) by dpvc
Fixed a bug that would cause step() to produce an error when called on
a constant value.  Also, added fact() function that was defined in
Algparser but not in Parser (which uses x! notation).

Revision 3445 - Directory Listing
Modified Mon Aug 1 14:20:16 2005 UTC (14 years, 5 months ago) by dpvc
Added missing "step" function that was defined in the AlgParser but
not in the Parser.

Be sure to copy the updated PGanswermacros.pl to the pg/macros directory.

Revision 3444 - Directory Listing
Modified Mon Aug 1 13:10:52 2005 UTC (14 years, 5 months ago) by dpvc
Make List("1,2,3") work like List("1","2","3") rather than produce a
list with one element that is a list.

Revision 3443 - Directory Listing
Modified Mon Aug 1 12:42:21 2005 UTC (14 years, 5 months ago) by dpvc
Added postfilter to Parser-based implementation of NUM_CMP so that the
student's answer is updated to be the result of evaluating the answer
(when there is no error in evaluating the answer).  This correctly
reflects the behaviour of the original NUM_CMP.

Revision 3442 - Directory Listing
Modified Mon Aug 1 12:37:35 2005 UTC (14 years, 5 months ago) by dpvc
Fixed typo that caused hilighting of the position of errors to be lost.

Revision 3441 - Directory Listing
Modified Mon Aug 1 12:04:23 2005 UTC (14 years, 5 months ago) by dpvc
Updates to make mode=>'frac' properly emulate the original num_cmp
behavior (it now allows decimals and fractions instead of requiring a
fraction).  There is also a new LimitedNumeric-StrictFraction context
(not currently used) that disallows decimals and requires fractions.

Revision 3440 - Directory Listing
Modified Mon Aug 1 12:01:39 2005 UTC (14 years, 5 months ago) by dpvc
Folded in Mike's changes for status messages.

Revision 3426 - Directory Listing
Modified Fri Jul 29 19:44:04 2005 UTC (14 years, 5 months ago) by sh002i
Fix use of $SIG{__WARN__} and $SIG{__DIE__}.

* Each change to $SIG{__WARN__} and $SIG{__DIE__} is now dynamically
scoped with "local", rather than changing globally and then restoring at
the end of the block.

* The special value "DEFAULT" is used instead of sub {CORE::die(@_)} or
sub {CORE::warn(@_)} when preparing to eval STRING code.

* Where $SIG{__WARN__} and $SIG{__DIE__} are overridden to do
preprocessing with PG_errorMessage, the previously installed handlers
will be called instead of the built-in warn or die functions after
preprocessing occurs. (For example, the warn and die handlers defined in
Apache::WeBWorK or the warn handler defined in WeBWorK::PG will be
called.)

* The behavior in process_answers is modified so that the custom
handlers are installed once before the answer evaluation loop. This
causes them to be in effect during the setup/teardown code, but I don't
think this will be a problem.

Revision 3400 - Directory Listing
Modified Fri Jul 22 22:59:12 2005 UTC (14 years, 5 months ago) by gage
Made listVariables and listFormVariables synonyms for listing all variables available to
the problem.

Revision 3393 - Directory Listing
Modified Wed Jul 20 18:30:59 2005 UTC (14 years, 6 months ago) by gage
Added a modification of the grades that shows where the
state_summary_msg can be added.  This message is
printed at the bottom of each problem page.  The current default
is a blank message, which means that the default message
defined in Problem.pm is printed.

There is currently no way to turn the message off entirely.  Perhaps
on the next revision.

Revision 3387 - Directory Listing
Modified Sat Jul 16 22:31:41 2005 UTC (14 years, 6 months ago) by gage
Added documentation for macros used in constructing
sequential problems.

Revision 3386 - Directory Listing
Modified Sat Jul 16 22:01:08 2005 UTC (14 years, 6 months ago) by gage
Macros that aid the construction sequentialProblems.  For these
problems certain sections of text are hidden until earlier
answers have been answered correctly.

-- Mike

Revision 3385 - Directory Listing
Modified Sat Jul 16 21:59:35 2005 UTC (14 years, 6 months ago) by gage
Added support for sequentialProblems.

Revision 3384 - Directory Listing
Modified Sat Jul 16 19:24:31 2005 UTC (14 years, 6 months ago) by jj
Fixed typo related to useBaseTenLog.

Revision 3383 - Directory Listing
Modified Fri Jul 15 02:57:01 2005 UTC (14 years, 6 months ago) by jj
Fixed typo.

Revision 3375 - Directory Listing
Modified Wed Jul 13 03:03:25 2005 UTC (14 years, 6 months ago) by dpvc
This file implements an easy way to add functions that are defined
within the Parser's Context.  See the comments in the file itself for
documentation on how to use it.

Revision 3374 - Directory Listing
Modified Wed Jul 13 01:46:49 2005 UTC (14 years, 6 months ago) by dpvc
Wrong correction in the previous commit.  Use CODE::push

Revision 3373 - Directory Listing
Modified Wed Jul 13 01:23:38 2005 UTC (14 years, 6 months ago) by gage
Made modifications that allow use of complex numbers in matrices.  You can
also LR decompose a non-square matrix.  Documentation is still needed
and further testing.

Revision 3372 - Directory Listing
Modified Wed Jul 13 01:22:43 2005 UTC (14 years, 6 months ago) by gage
Made modifications that allow the use of complex numbers in matrices

Revision 3371 - Directory Listing
Modified Tue Jul 12 22:39:56 2005 UTC (14 years, 6 months ago) by dpvc
Make error messages potentially localizable (by making them use
sprintf-style strings rather than variable subtitution).

Revision 3370 - Directory Listing
Modified Tue Jul 12 22:29:53 2005 UTC (14 years, 6 months ago) by dpvc
A first pass at making parser error messages localizable.  The
Context()->{error}{msg} hash can be used to specify translations of
the standard messages.  For example,

    Context()->{error}{msg}{'Division by zero'} = "Don't divide by zero, dude!";
    Context()->{error}{msg}{'Function '%s' has too many inputs'} =
        "You passed too many arguments to '%s'";

(I didn't translate into another language, here, but you could do
that, too.)

The msg hash could also be used within answer checkers to make certain
answer messages more appropriate for the given type of expected answer.

Revision 3369 - Directory Listing
Modified Tue Jul 12 21:05:37 2005 UTC (14 years, 6 months ago) by dpvc
Fixed various perl compiler warnings (due to extra "my", and so on).

Revision 3367 - Directory Listing
Modified Tue Jul 12 02:02:46 2005 UTC (14 years, 6 months ago) by dpvc
Fixed problem with minus signs in formulas that are turned into perl
mode.  Perl needs extra spaces to avoid problems with -e type operators.

Revision 3364 - Directory Listing
Modified Fri Jul 8 21:45:14 2005 UTC (14 years, 6 months ago) by jj
Fixed typo in installation instructions.

Revision 3363 - Directory Listing
Modified Thu Jul 7 02:40:52 2005 UTC (14 years, 6 months ago) by gage
Added some pod documentation to this file.  It needs more -- several methods
of MatrixReal1 have been overridden

Revision 3360 - Directory Listing
Modified Tue Jul 5 22:13:16 2005 UTC (14 years, 6 months ago) by gage
Added some pod documentation

Revision 3359 - Directory Listing
Modified Tue Jul 5 21:58:51 2005 UTC (14 years, 6 months ago) by sh002i
chech tthPreamble path and mtime to deal with changes to the file
between runs. this is necessary now that dangerousMacros.pl is cached.
Closes bug #798.

Revision 3353 - Directory Listing
Modified Tue Jul 5 01:43:30 2005 UTC (14 years, 6 months ago) by dpvc
Don't load Parser.pl (it causes trouble with the Matrix.pm module).
We only needed it because of the calls to Real() that were being used
by Formula objects, so have them call Value::Real directly.

be sure to get the latest versions of Parser and Value (including the
top-level Parser.pm and Value.pm) in order to use this update.

Revision 3352 - Directory Listing
Modified Tue Jul 5 01:38:19 2005 UTC (14 years, 6 months ago) by dpvc
Modified the perl() method to make calles to Value:: directly rather
than to the main:: stubs for creating Value objects.  This will make
it work better from within packages or when Parser.pl hasn't been
loaded.

A few things still won't work in this case; e.g., calls to Closed()
for intervals (these could be handled better using ->with()) and to
functions like Factorial and log10 that are defined in Parser.pl.

Finally, there should be better object-based control over what
routines are called to create these objects, so that subclasses of the
Value objects will be able to be generated correctly.

Revision 3351 - Directory Listing
Modified Tue Jul 5 00:31:57 2005 UTC (14 years, 6 months ago) by gage
Modified formatting

Revision 3350 - Directory Listing
Modified Tue Jul 5 00:08:54 2005 UTC (14 years, 6 months ago) by dpvc
Main file that calls in the legacy modules.

Revision 3349 - Directory Listing
Modified Mon Jul 4 22:11:08 2005 UTC (14 years, 6 months ago) by gage
Add comment

Revision 3348 - Directory Listing
Modified Mon Jul 4 20:18:40 2005 UTC (14 years, 6 months ago) by dpvc
Folded in Mike's changes to checkbox_cmp.

Revision 3347 - Directory Listing
Modified Mon Jul 4 20:12:22 2005 UTC (14 years, 6 months ago) by dpvc
This is an attempt at making the traditional answer checkers call the
new Parser in place of their original ones.  That is, if you follow
the instructions in the README file, then problems that use
std_num_cmp(), fun_cmp(), etc. will really be using the new Parser
instead of the original PGanswermacros.pl versions.

The old answer checkers are still available, and can be switched back
on a site-wide, course-wide, or problem-by-problem basis.  See the
README for details.

Revision 3346 - Directory Listing
Modified Mon Jul 4 19:52:38 2005 UTC (14 years, 6 months ago) by gage
Rewrote checkbox_cmp as an AnswerEvaluator

Revision 3345 - Directory Listing
Modified Mon Jul 4 19:49:06 2005 UTC (14 years, 6 months ago) by gage
Reworked some of the code for AnswerEvaluator

The messages printed out when using the debug flag should now
be somewhat better.

-- Mike

Revision 3344 - Directory Listing
Modified Mon Jul 4 19:39:37 2005 UTC (14 years, 6 months ago) by dpvc
Fixed problem with sorting (problem with $a, $b, I think).

Revision 3343 - Directory Listing
Modified Mon Jul 4 16:21:04 2005 UTC (14 years, 6 months ago) by dpvc
Handle TeX versions of variables whose names include underscores
better.

Revision 3342 - Directory Listing
Modified Mon Jul 4 15:53:26 2005 UTC (14 years, 6 months ago) by dpvc
Better messages when adaptive parameters are too big.

Revision 3341 - Directory Listing
Modified Mon Jul 4 15:43:53 2005 UTC (14 years, 6 months ago) by dpvc
Implement "remove trailing zeros" format, like in prfmt().  I still
think '%g' works better in most cases ('%f#' will print larger values
without using scientific notation, which is nice, but will print small
numbers like .000000005 as 0, even though the fuzzy comparison of this
to zero will not be true.)

Revision 3340 - Directory Listing
Modified Mon Jul 4 15:22:40 2005 UTC (14 years, 6 months ago) by gage
Commenting out unused code.  This file still needs a lot of work.

Revision 3339 - Directory Listing
Modified Mon Jul 4 15:22:22 2005 UTC (14 years, 6 months ago) by dpvc
Don't use the overloaded Real class for doing adaptive parameter
checks (use non-fuzzy checks, since we are checking the fuzziness by hand).

Revision 3338 - Directory Listing
Modified Mon Jul 4 15:21:52 2005 UTC (14 years, 6 months ago) by gage
Restored str_filters -- removing it broke some of the other answer evaluators.

str_filters takes a string, filters it and then returns the filtered string.

The actual filters have been changed to work with answer hashes rather than with
strings, so str_filters warps the string in an answer hash before sending it through
the filters.

sorry for the breakage.

-- Mike

Revision 3336 - Directory Listing
Modified Mon Jul 4 13:15:57 2005 UTC (14 years, 6 months ago) by dpvc
Change so as not to use raw HTML in the error messages.

Revision 3335 - Directory Listing
Modified Mon Jul 4 03:28:09 2005 UTC (14 years, 6 months ago) by dpvc
Allow Parser::Number::NoDecimals() to accept a context to be modified
(rather than always changing the curent context).

Revision 3334 - Directory Listing
Modified Sun Jul 3 20:10:37 2005 UTC (14 years, 6 months ago) by dpvc
Updates to allow string matches to be case-insensitive.  This is now
the default, and can be overridden in the Context by setting the
string's "caseSensitive" attribute.  e.g.:

	 Context()->strings->add("FooBar"=>{caseSensitive=>1});

would rewuire "FooBar" to be entered exactly as typed.

Revision 3333 - Directory Listing
Modified Sun Jul 3 20:06:33 2005 UTC (14 years, 6 months ago) by dpvc
Adjusted some spacing

Revision 3332 - Directory Listing
Modified Sun Jul 3 20:05:28 2005 UTC (14 years, 6 months ago) by dpvc
Fixed a bug in the enable/disable routines that would cause them to
always work on the current context rather than the one whose
enable/disable method was being called.

Revision 3328 - Directory Listing
Modified Fri Jul 1 15:52:36 2005 UTC (14 years, 6 months ago) by gage
Added commment

Revision 3325 - Directory Listing
Modified Wed Jun 29 17:10:11 2005 UTC (14 years, 6 months ago) by gage
Added comments.

Revision 3324 - Directory Listing
Modified Wed Jun 29 16:19:42 2005 UTC (14 years, 6 months ago) by gage
Fixed bug in radio_cmp closing bug #258.  We now check to make
sure that only a single string is being passed and not an array.
(The latter occurs if checkboxes are used instead of radio buttons.)
The presence of two checked checkboxes triggers a warning.

Revision 3323 - Directory Listing
Modified Wed Jun 29 02:48:55 2005 UTC (14 years, 6 months ago) by gage
MASSIVE changes to str_cmp and related subroutines (mostly in STR_CMP).

This answer evaluator now produces an AnswerEvaluator type rather than
a subroutine.

Revision 3322 - Directory Listing
Modified Wed Jun 29 02:47:40 2005 UTC (14 years, 6 months ago) by gage
Corrected how preview_latex_strings are handled when two
AnswerHashes are ANDed or ORed.

Revision 3320 - Directory Listing
Modified Tue Jun 28 19:38:16 2005 UTC (14 years, 6 months ago) by gage
Format changes.

Revision 3319 - Directory Listing
Modified Tue Jun 28 19:36:52 2005 UTC (14 years, 6 months ago) by gage
Many changes to this file.  I've fixed multi_cmp which
will check a comma separated string of answers.

I have commented out many other routines which do not appear
to be in use.

Revision 3314 - Directory Listing
Modified Fri Jun 24 20:11:23 2005 UTC (14 years, 6 months ago) by gage
Fixed conceptual error in compare_vec_solution.  This should fix bug
#670.  In my opinion the entire concept of vec_solution_cmp should be
reconsidered.  In solving an underdetermined linear equation of the form
Ax-b=0 it seems to me that the solutions answer in the form:
x= a +bt+cu+ds  where a,b,c,d are vectors should simply be evaluated
to see if it satisfies Ax-b=0 for 5 or six values of a,b,c,d  --
checking the solution should use a
vector valued version of fun_cmp.

As it is, the student's coefficients for a,b,c,d are compared with the
instructors to see if they span the same space. This is quite a bit more
complicated -- and indeed the method came up with the wrong answer.

I believe I have the method corrected, but I would suggest that this
answer evaluator be replaced with one which operates more
directly and is therefore easier to maintain.  Am I missing something in
this analysis?  Has someone else created answer evaluators for this type
of problem?

 -- Mike

Revision 3305 - Directory Listing
Modified Tue Jun 21 19:56:00 2005 UTC (14 years, 6 months ago) by jj
New context which allows students to use C(n,r) and P(n,r) in their
answers.  To support this, the webwork versions of these functions
have been moved from PGaux... to PGcommon...

Revision 3298 - Directory Listing
Modified Thu Jun 16 15:32:02 2005 UTC (14 years, 7 months ago) by dpvc
New flag showAllErrors for when a custom checker is supplied.  This
will cause all errors generated in the user's code to be reported
(normally, messages from the Value and Parser packages are ignored).

Revision 3297 - Directory Listing
Modified Thu Jun 16 04:04:23 2005 UTC (14 years, 7 months ago) by dpvc
Fixed typos in comments.

Revision 3296 - Directory Listing
Modified Thu Jun 16 04:03:40 2005 UTC (14 years, 7 months ago) by dpvc
Fixed a problem with auto-generated functions getting an incomplete
variable list.

Revision 3295 - Directory Listing
Modified Thu Jun 16 00:52:13 2005 UTC (14 years, 7 months ago) by gage
Fixed documentation for $graph->size()

Revision 3294 - Directory Listing
Modified Wed Jun 15 23:55:17 2005 UTC (14 years, 7 months ago) by dpvc
Implements a Parser context in which only polynomials (of a single
variable) can be entered.  Only sums of multiples of powers of the
variable are allowed to be entered (though the coefficients can
contain mathematical operations).  An optional flag lets you specify
that only one term of each degree is allowed, so the student would
have to combine 1+x+x+x^2 to get 1+2x+x^2 in that case.

Revision 3291 - Directory Listing
Modified Wed Jun 15 22:00:32 2005 UTC (14 years, 7 months ago) by jj
Changed whitespace removal of TeX strings to safer version.

Revision 3274 - Directory Listing
Modified Thu Jun 9 11:16:01 2005 UTC (14 years, 7 months ago) by dpvc
Fixed Disable() and Enable() so that they can be called as

    Context()->functions->disable()
and
    Context()->functions->enable()

as well as

    Parser::Context::Functions::Disable()
and
    Parser::Context::Functions::Enable()

The former is the preferred syntax.

Revision 3273 - Directory Listing
Modified Mon Jun 6 02:32:20 2005 UTC (14 years, 7 months ago) by dpvc
Forgot to check hardcopy mode.  Fixed some problems with that.  The
answer array items have to turn off verbatim mode that is used when
answer are included in the hardcopy.  This causes paragraph breaks
between entries in a singleResult MultiPart that includes ans_arrays,
which make the output less pretty, but at least they show up.

Revision 3270 - Directory Listing
Modified Mon Jun 6 00:01:44 2005 UTC (14 years, 7 months ago) by dpvc
This file implements a Multi-Part parser object that allows you to tie
several input blanks to a single answer checker that can compare the
student's answers in several blanks in order to determine which are
correct.

For example:

      $mp = MultiPart("x^2",1,-1)->with(
        singleResult => 1,
        checker => sub {
          my ($correct,$student,$self) = @_;  # get the parameters
          my ($f,$x1,$x2) = @{$student};      # extract the student answers
          Value::Error("Function can't be the identity") if ($f == 'x');
          Value::Error("Function can't be constant") if ($f->isConstant);
          return $f->eval(x=>$x1) == $f->eval(x=>$x2);
        },
      );
           .
      BEGIN_TEXT
        \(f(x)\) = \{$mp->ans_rule(20)\} produces the same value
        at \(x\) = \{$mp->ans_rule(10)\} as it does at \(x\) = \{$mp->ans_rule(10)\}.
      END_TEXT

      ANS($mp->cmp);

This produces three answer blanks all tied to the same checker, which
is supplied by the user when the MultiPart is specified.  This one
checks if two inputs to a function provide the same output.

The answer blanks can each produce a separate row in the results area
at the top of the page, or they con be combined into a single row, as
in this case.  The checker routine can provide error messages for
individual parts via the setMessage() method, or for the problem as a
whole, as above.  Finally, the ans_array() method can be used to
produce answer blanks for individual entries for those objects that
support such arrays.

See the documentation at the top of the file for additional details.

Revision 3269 - Directory Listing
Modified Sun Jun 5 23:52:11 2005 UTC (14 years, 7 months ago) by dpvc
Added ability to have Matrix, Vector and Point objects produce input
arrays similar to the ones available in PGmatrixmacros.pg.  This
provides some substantial new functionality, and it may still have
some shaking down to do, but it should not affect the existing
functionality of the answer checkers.

To create an answer array for a matrix, vector or point, use the new
ans_array() or named_ans_array() methods of these objects.  For
example:

	Context("Matrix");
	$M = Matrix([1,2],[3,4]);

	BEGIN_TEXT
	\{$M->TeX\} = \{$M->ans_array\}
	END_TEXT

	ANS($M->cmp);

This creates a matrix, then prints it ans creates an answer array of
the appropriate size for the matrix.  The answer checker will
automatically know to handle the multiple entry blanks.

To used a named answer rule, use:

	Context("Matrix");
	$M = Matrix([1,2],[3,4]);

	BEGIN_TEXT
	\{$M->TeX\} = \{$M->named_ans_array('fred')\}
	END_TEXT

	NAMED_ANS(fred => $M->cmp);

Both methods also take an optional argument that specifies the width
of the answer rules.  The default is 5.

You can get a multi-input point or vector array as well, and you can
make column vectors as follows:

        Context("Vector");
	$V = ColumnVector("1+x","3x","1-x");

	BEGIN_TEXT
	\{$V->TeX\} = \{$V->ans_array\}
	END_TEXT

	ANS($V->cmp);

Note that you can make answer arrays for matrices and vectors of
formulas as well as constants, provided the formula is an explicit
matrix or vector of formulas, and is not obtained by matrix
arithmatic.

For concistencey, all objets now have ans_rule and named_ans_rule
methods as well.  The default width is 20 for these.

Revision 3268 - Directory Listing
Modified Sun Jun 5 23:36:28 2005 UTC (14 years, 7 months ago) by dpvc
Removed some unused lines and comments.
Removed unnecessary spaces from around answer-rule-extension rules,
and made the TeX version of this rule be based on the width, as is
the case for ans_rule.

Revision 3267 - Directory Listing
Modified Sun Jun 5 23:25:20 2005 UTC (14 years, 7 months ago) by dpvc
Allow for vectors to be marked as Column Vectors.

Revision 3266 - Directory Listing
Modified Sun Jun 5 23:24:29 2005 UTC (14 years, 7 months ago) by dpvc
Better handling of delimiters that are explicitly set byt he user.
Fixed an incorrect call during object class promotion.
Added ability to sepcify that a vector is a Column Vector.

Revision 3265 - Directory Listing
Modified Sun Jun 5 23:22:20 2005 UTC (14 years, 7 months ago) by dpvc
Better handling of open and close delimiters that are explicitly set.

Revision 3264 - Directory Listing
Modified Sun Jun 5 23:18:01 2005 UTC (14 years, 7 months ago) by dpvc
Fix some incorrect calls when the promoting types to higher precedence
object types.

Revision 3263 - Directory Listing
Modified Sun Jun 5 23:08:32 2005 UTC (14 years, 7 months ago) by dpvc
Fixed a bug with Matrix->perl() method that would cause an extra level
of nesting in constant matrices.

Revision 3261 - Directory Listing
Modified Sat Jun 4 13:50:41 2005 UTC (14 years, 7 months ago) by dpvc
Avoid possible infinite loop with length and typeref calls.

Revision 3260 - Directory Listing
Modified Sat Jun 4 13:50:01 2005 UTC (14 years, 7 months ago) by dpvc
Remove unneeded comment.

Revision 3259 - Directory Listing
Modified Fri Jun 3 22:03:23 2005 UTC (14 years, 7 months ago) by dpvc
Added a ->with() method that lets you set fields of a Parser object as
you create it.  For example:

    $f = Formula("sqrt(x)")->with(limits=>[0,3]);

or

    ANS(Formula("(x+1)/x")->with(checkUndefinedPoints=>1,test_at=>[[0]])->cmp);

or

    ANS($f->with(test_points=>[[0],[1],[2]])->cmp);

Revision 3258 - Directory Listing
Modified Fri Jun 3 19:14:00 2005 UTC (14 years, 7 months ago) by dpvc
Better control over number of points that can be undefined, and
new ability to specify required test points plus additional random
ones.  (Previously, if you set the test points, no random points were
generated.)  For example:

     $f = Formula("(x^2-1)/(x-1)");
     $f->{test_at} = [[1]];  # test at x=1 plus random points

as opposed to

     $f->{test_points} = [[-1],[0],[1]];

which tests only the points x = -1, x = 0 and x = 1.

Revision 3257 - Directory Listing
Modified Thu Jun 2 22:50:24 2005 UTC (14 years, 7 months ago) by dpvc
Modified the Formula answer checker to allow checking of points where
the functions are undefined (i.e., attempt to check that the domains
agree).  This can be enabled by setting the checkundefinedPoints flag
in the Context(), or in the formula itself.  Test points where the
function is undefined will be retained and the student's answer will
have to be undefined at the same points.  If the points are selected
at random, the points where the function is undefined are kept in
addition to the ones where it is defined, so the required number of
test points where the function IS defined will still need to be
found.  The number of undefined points can be up to the number of
defined points.  This number can be reduced by setting the
max_undefined flag.  If you want to guarantee that a specific
undefined point be tested, you can provide that point using the
test_points field of the formula.  For example:

     Context()->flags->set(checkUndefinedPoints=>1);
     $f = Formula("(x^2-1)/(x-1)");
     $f->{test_points} = [[-1],[0],[1],[2]];
     ANS($f->cmp);

will guarantee that the singularity at x=1 is tested, so the answer
x+1 will not be marked as correct.

If an answer matches at all the test points where the functions are
both defined, but some of the undefind points differ between the two
functions, the answer checker will generate an error message
indicating that the domains of the functions don't agree.  (This is
ONLY generated with the functions match except for that.)  This can be
controlled by setting the showDomainErrors flag in the formula's cmp()
call:

     ANS($f->cmp(showDomainErrors=>0));

The default is to show these errors.

Revision 3256 - Directory Listing
Modified Thu Jun 2 19:53:06 2005 UTC (14 years, 7 months ago) by dpvc
Fixed an accidental hard-coded operation from always being "add" to
being the correct operation when promoting the operations to an object
of higher precedence.  (But since formulas are normally the highest
precedence, this will never have occurred.)

Revision 3225 - Directory Listing
Modified Sat May 14 01:42:25 2005 UTC (14 years, 8 months ago) by dpvc
Changed loadMacros() to use search for amcros files via a
user-cusomizable path of directories.  This is specified in the
global.conf file, and can include any number of directories.

The path can include "." to mean look in the .pg file's directory.
This makes it possible to store special macros files with the code
that uses them.

By default, the path is ".", the course/templates/macro directory,
then the pg/macros directory (in that order).  This duplicates the
current behaviour, except for the ".", which is new.

You must also make the updates to the global.conf,
webwork2/lib/WeBWorK/PG.pm, and webwork2/lib/WeBWorK/PG/Local/pm files.

Revision 3221 - Directory Listing
Modified Mon May 2 00:58:00 2005 UTC (14 years, 8 months ago) by dpvc
During a call(), if the evaluation produced an error message generated
by Value::Error, report it, otherwise report a generic message.

Revision 3220 - Directory Listing
Modified Mon May 2 00:56:19 2005 UTC (14 years, 8 months ago) by dpvc
Changed the call method to check if the function is actually defined
inthe parser before calling the parser method.  This allows things
like C(n,r) to be moved here but not automatically included in the
Context.

Revision 3219 - Directory Listing
Modified Fri Apr 29 22:30:55 2005 UTC (14 years, 8 months ago) by dpvc
Added derivative of |x| as x/|x|.

Revision 3218 - Directory Listing
Modified Fri Apr 29 02:37:13 2005 UTC (14 years, 8 months ago) by dpvc
Fixed a bug with adaptive parameters where the relative tolerance
was not being properly computed.  This allowed large constants to be
treated as correct when they shouldn't be.

Revision 3217 - Directory Listing
Modified Wed Apr 27 21:30:13 2005 UTC (14 years, 8 months ago) by dpvc
Copy parameters like limits, etc, to the newly created formula when
'C0' is added by the "upToConstant=>1" option in formula cmp().

Revision 3216 - Directory Listing
Modified Wed Apr 27 21:29:10 2005 UTC (14 years, 8 months ago) by dpvc
Use correct form of "x" with lists (rather than hack using split()).

Revision 3214 - Directory Listing
Modified Sat Apr 9 18:33:07 2005 UTC (14 years, 9 months ago) by gage
Provide a default warning subroutine if none has been defined.

Revision 3210 - Directory Listing
Modified Thu Mar 31 19:44:49 2005 UTC (14 years, 9 months ago) by dpvc
Added a check that the coordinates are numeric.  This avoids an error
were <i+j+k> was accepted as OK.

Revision 3208 - Directory Listing
Modified Tue Mar 29 19:16:36 2005 UTC (14 years, 9 months ago) by dpvc
Provide an easy means of generating a custom answer checker based on
an user-supplied subroutine.  Most of the work is done by the Parser's
answer checker framework, and the user's routine is called at the
point that the student's answer is compared to the correct answer.

Revision 3207 - Directory Listing
Modified Tue Mar 29 13:14:17 2005 UTC (14 years, 9 months ago) by dpvc
Handle error messages in the list checker better.  In particular, make
the error messages generated by custom checkers called on elements in
the list look better.  Also, in an ordered list, if the student enters
extra values, call an answer checker to do a syntax check.  (By
default, use the first element again, but the user can supply a
separate object to use for the checker using the extra=>object
option.)

Revision 3206 - Directory Listing
Modified Tue Mar 29 03:25:29 2005 UTC (14 years, 9 months ago) by dpvc
Compartmentalize the equality check one step further.  The cmp_equal
method now calls a new cmp_compare method to perform the actual
comparison (rather than use == directly).  The cmp_compare method
either calls a user-supplied checker routine, or defaults to using the
== operator.  The list checker also uses cmp_compare to check the
individual items in the list.  The list checker also calls a new
cmp_list_checker method to perform the list check.  This can be
overridden by a user-supplied list-checking routine.

To supply an alternate checking routine, use the "checker" option to
the cmp() method of the correct answer object.  For example:

    sub check {
      my ($correct,$student,$ans) = @_;
      return 0 unless $correct->length == $student->length;
      my ($x,$y) = $student->value;  # break up a point;
      return $x**2 - $y**2 = 1;      # check if it is on a hyperbola
    }
    Point(1,0)->cmp(checker=>~~&check);

This will check if the student's point lies on the given hyperbola.  All
the usual error messages will be issued if the student's answer is not
a point, or is of the wrong dimension, etc.

You can use

    sub list_check {
      my ($correct,$student,$ans) = @_;
      my @correct = @{$correct}; my @student = @{$student};
      ...
      return ($score,@errors);
    }
    List(...)->cmp(list_checker=>~~&list_check);

to replace the list-checking routine with your own custom one.  The
$correct and $student values are array references to the elements in
the lists provided by the professor and student.  (Note that you do
NOT get a List() object; this allows you to handle lists of formulas,
since a List of formulas becomes a formula returning a list).  The
checker routine should return the number of correct elements in the
student's list ($score), and a list of error messages produced while
checking the two lists (@errors).  (This is a list of messages, since
you might want to include an error for each entry in the list, for
example).

If your checker or list_checker routine wants to die with an error
message, use Value::Error(message).  This will put the message in the
WeBWorK display area at the top of the page.  If you use die(message),
or if the code fails due to a runtime error, then "pink screen of
death" will be produced indicating the error and asking the student to
report the error to the professor.

Revision 3205 - Directory Listing
Modified Tue Mar 29 02:55:10 2005 UTC (14 years, 9 months ago) by dpvc
Properly handle string values in postprocessing of vectors and other
related lists.  (It used to report a dimension error for things like 'NONE').

Revision 3204 - Directory Listing
Modified Mon Mar 28 23:47:50 2005 UTC (14 years, 9 months ago) by dpvc
Peroperly negate infinities even when reduceConstants is not in
effect.

Revision 3203 - Directory Listing
Modified Mon Mar 28 23:46:06 2005 UTC (14 years, 9 months ago) by dpvc
Handle extra parentheses better.

Revision 3202 - Directory Listing
Modified Mon Mar 28 23:45:27 2005 UTC (14 years, 9 months ago) by dpvc
Handle log as ln or log properly.

Revision 3199 - Directory Listing
Modified Sun Mar 20 13:13:44 2005 UTC (14 years, 10 months ago) by dpvc
Implements an experimental answer checker for implicitly defined
curves and surfaces.

Revision 3196 - Directory Listing
Modified Wed Mar 16 13:40:29 2005 UTC (14 years, 10 months ago) by dpvc
Implements an answer evaluator that checks if a students answer
satisfies a given equality.  See the comments in the file for details
about how to use the answer checker.

Revision 3195 - Directory Listing
Modified Wed Mar 16 13:36:33 2005 UTC (14 years, 10 months ago) by dpvc
Now that the uverloaded operators handle subclassing properly, we can
use promotePrecedence in the compare routines, just in case we define
a subclass with even HIGHER precedence!

Revision 3194 - Directory Listing
Modified Wed Mar 16 13:35:01 2005 UTC (14 years, 10 months ago) by dpvc
removed a commented-out line that was no longer needed.

Revision 3193 - Directory Listing
Modified Wed Mar 16 13:33:59 2005 UTC (14 years, 10 months ago) by dpvc
Fixed a typo.

Revision 3192 - Directory Listing
Modified Wed Mar 16 13:30:28 2005 UTC (14 years, 10 months ago) by dpvc
Update the overloaded operators so that they can be overridden by
subclasses of the predefined object classes.  This involves calling
the objects method rather than using a hard reference to the routine
in the parent class.

Also, change the name of the string comparison routine to
compare_string to avoid conflicts with cmp that is used to produce the
answer checker for the class.

Finally, in Value.pm, promotePrecedence no longer has to do fancy
footwork to get "special" precedence to work (this was a hack to get
around the misfeature of the overloaded operators -- now that that is
being handled correctly, there is no need for it).

Revision 3191 - Directory Listing
Modified Wed Mar 16 04:17:35 2005 UTC (14 years, 10 months ago) by dpvc
Fixed error with asec and acsc where the parameters were not being
passed properly.

Revision 3187 - Directory Listing
Modified Sat Feb 26 23:03:12 2005 UTC (14 years, 10 months ago) by gage
Allow subclasses of AnswerEvalutor to be used.  Check for a match
with a substring AnswerEvaluator instead of equality.

Revision 3180 - Directory Listing
Modified Sat Feb 19 16:47:36 2005 UTC (14 years, 11 months ago) by gage
Small correction that makes sure that _init subroutines are read
properly.  The original works on some versions of perl, but not on
others.

Revision 3177 - Directory Listing
Modified Fri Feb 18 00:04:09 2005 UTC (14 years, 11 months ago) by dpvc
Missed one situation when making the previous update.  Fixed it.

Revision 3174 - Directory Listing
Modified Thu Feb 17 16:12:45 2005 UTC (14 years, 11 months ago) by dpvc
Fixed it so that direct calls to the add, sub, mult, etc functions
would work as expected (even though there is no need to call them directly).

Revision 3172 - Directory Listing
Modified Tue Feb 15 21:58:54 2005 UTC (14 years, 11 months ago) by dpvc
Updated the answer checkers so that you can more easily specify how
the correct answer shoudl be displayed.  In the past, you could use
something like Real(sqrt(2))->cmp(correct_ans=>"sqrt(2)") to do this,
but that is awkward.  Now the Compute() function (which parses and
then evaluates a string) sets things up so that the original string
will be what is used as the correct answer.  That means
Compute("sqrt(2)")->cmp will have the same result as the example
above.

You can also set the {correct_ans} properly of any Parser object to
have that value used as the correct answer.  For example

     $x = Real(sqrt(2));
     $x->{correct_ans} = "sqrt(2)";
     ANS($x->cmp)

would also produce the same answer checker as the two previous
examples.  All three methods should work.  Use the one that is most
convenient for you.

Revision 3171 - Directory Listing
Modified Tue Feb 15 21:53:23 2005 UTC (14 years, 11 months ago) by dpvc
Improved the Real(), Complex(), Point(), Vector(), Matrix() and
String() constructors so that they will process formulas passed to
them as strings rather than requiring perl objects for these.

For example, you can use Real("2/3") rather than Real(2/3) if you
want.  Also, Real("1+x") will return a formula returning a real
(essentially the same as Formula("1+x") in this case).

Revision 3166 - Directory Listing
Modified Tue Feb 15 02:20:52 2005 UTC (14 years, 11 months ago) by dpvc
Fixed an error with Matrix() that could cause it to loop infinitely
when bad data is passed to it.

Also, allow Matrix(), Point(), Vector(), and Real() to accept string
values that are evaluated to produce the value returned.

(Sorry, accidentally committed with a blank message.)

Revision 3165 - Directory Listing
Modified Tue Feb 15 02:16:10 2005 UTC (14 years, 11 months ago) by dpvc
*** empty log message ***

Revision 3159 - Directory Listing
Modified Thu Feb 10 22:34:01 2005 UTC (14 years, 11 months ago) by dpvc
Fixed a problem that caused errors to occur when ImplicitPlane() was
called with a formula whose constant term is a negative number that is
produced by a computation.

Revision 3158 - Directory Listing
Modified Wed Feb 9 18:36:18 2005 UTC (14 years, 11 months ago) by apizer
Allow labels A - ZZ

Arnie

Revision 3136 - Directory Listing
Modified Sat Feb 5 14:07:55 2005 UTC (14 years, 11 months ago) by jj
Work around IE bug for ordered lists.  Maybe someday this can be undone.

Revision 3093 - Directory Listing
Modified Sun Jan 16 00:52:49 2005 UTC (15 years ago) by gage
Undoing some of the temporary changes I made to the warn message.

This may break what happens with xmlrpc however. (sigh)

Revision 3074 - Directory Listing
Modified Tue Jan 4 17:56:33 2005 UTC (15 years ago) by dpvc
Fixed index problem with matrix multiplciation.  (It was returning the
transpose!)

Revision 3071 - Directory Listing
Modified Sat Jan 1 22:29:41 2005 UTC (15 years ago) by gage
Temporary modifications which allow the Warning mechanisms to work when
using the XML access methods.

This needs to be looked at again.  There is also a problem with defining
permissions for creating directories.  There is a temporary #FIXME
that seems to work.

Revision 3047 - Directory Listing
Modified Sat Dec 18 21:52:58 2004 UTC (15 years, 1 month ago) by gage
Changed comment to This answer is the same as the one you just submitted
or previewed.  This addreses bug #557

Revision 3039 - Directory Listing
Modified Fri Dec 17 17:11:46 2004 UTC (15 years, 1 month ago) by gage
Added a check to handle  the  case when the $errors flag was not defined.

Revision 2991 - Directory Listing
Modified Tue Nov 9 15:23:38 2004 UTC (15 years, 2 months ago) by gage
Defined some variables that were causing warning messages.
Someone more familiar with this script should look at this
to make sure that this subsection of the parser is working correctly.

-- Mike

Revision 2988 - Directory Listing
Modified Fri Nov 5 17:54:12 2004 UTC (15 years, 2 months ago) by jj
Avoids some name collisions for images converted from gif to png in
hardcopy, specifically if two problems have different gif images
with the same name (but the gifs are in different directories).  Now one
png won't overwrite the other.

Revision 2986 - Directory Listing
Modified Thu Nov 4 22:01:18 2004 UTC (15 years, 2 months ago) by apizer
relative tolerence was not being used correctly. Fixed this.

Arnie

Revision 2985 - Directory Listing
Modified Wed Nov 3 22:39:21 2004 UTC (15 years, 2 months ago) by dpvc
Fixed a bug in processing absolute values with implicit
multiplication.

Revision 2984 - Directory Listing
Modified Wed Nov 3 22:00:56 2004 UTC (15 years, 2 months ago) by dpvc
Modifications needed for the control of jsMath's "missing font"
message.

Revision 2982 - Directory Listing
Modified Wed Nov 3 21:27:42 2004 UTC (15 years, 2 months ago) by dpvc
Fixed an error where any plane is accepted if the d is 0 in
ax + by + cz = 0.

Revision 2972 - Directory Listing
Modified Tue Nov 2 20:47:23 2004 UTC (15 years, 2 months ago) by sh002i
added README and LICENCE files.

Revision 2969 - Directory Listing
Modified Tue Nov 2 01:55:21 2004 UTC (15 years, 2 months ago) by dpvc
Fixed typo in a comment.

Revision 2958 - Directory Listing
Modified Sun Oct 24 14:36:35 2004 UTC (15 years, 2 months ago) by jj
This seems to fix bug 713.  I don't see why one would want the line below
commented out.

Revision 2957 - Directory Listing
Modified Sun Oct 24 14:33:36 2004 UTC (15 years, 2 months ago) by jj
Make combinations function C(n,k) return 0 when k>n, which is standard.
Maybe P(n,k) should do the same instead of throwing an error?

Revision 2938 - Directory Listing
Modified Tue Oct 19 00:24:47 2004 UTC (15 years, 3 months ago) by dpvc
Added reduction rules to remove redundent negatives.
Override string and TeX methods that avoid redundent parentheses.

Revision 2937 - Directory Listing
Modified Tue Oct 19 00:23:01 2004 UTC (15 years, 3 months ago) by dpvc
Added "areParallel" method as a synonym for "isParallel".

Revision 2936 - Directory Listing
Modified Tue Oct 19 00:22:07 2004 UTC (15 years, 3 months ago) by dpvc
Don't promote an object unless it is a Value object.

Revision 2935 - Directory Listing
Modified Tue Oct 19 00:20:02 2004 UTC (15 years, 3 months ago) by dpvc
Prevent automatically reducing negatives in student answer, so the
sign doesn't change behind our back.

Revision 2934 - Directory Listing
Modified Tue Oct 19 00:15:54 2004 UTC (15 years, 3 months ago) by dpvc
Handle error messages better.  Produce an error if the student answer
is a constant vector.  Prevent reduction of some negatives in order to
avoid -(a+bt).  Allow students to provide answer in terms of points
rather than vectors.

Revision 2933 - Directory Listing
Modified Tue Oct 19 00:11:50 2004 UTC (15 years, 3 months ago) by dpvc
Changed the order of variables in calls to Plane() so that it
corresponds to the usage in ImplictPlane().  Also fixed a typo in
capitalization of @N.

Revision 2932 - Directory Listing
Modified Tue Oct 19 00:08:04 2004 UTC (15 years, 3 months ago) by dpvc
Updated i(), j() and k() functions to check if the Parser is loaded,
and if not, return a value that will cause perl to report a better
error than calling the parser outside of its normal context.

Since the current answer checkers call perl directly to evaluate their
expressions, when a variable is used by a student that is not a
variable used by the checker, this can cause perl to try to parse
those variables as function calls, or other perl constructs (like
matches if you use 'm' or translations if you use 'y').  This is bad
(and is not a problem with the new parser).

In particular, if the student uses 'k' in a formula for which k is not
defined, for example, perl will try to call the k() function.

Revision 2916 - Directory Listing
Modified Wed Oct 13 18:41:07 2004 UTC (15 years, 3 months ago) by dpvc
Clear error messages before doing the answer check (this clears old
messages left over inclass this checker is called by another one,
e.g. when using UNORDERD_ANS()).

Revision 2915 - Directory Listing
Modified Wed Oct 13 03:31:17 2004 UTC (15 years, 3 months ago) by dpvc
Trap errors in functions that are not native perl functions (like
acos() and csc(), etc.).  In the past, if an error occurred within the
definition of a function, the error message that was reported was the
internal error within the definition of the function.  For example
csc(0) would report "illegal division by zero", while acos(-2) would
report "can't take sqrt of -3".  Now the errors will be "can't take
csc of 0" and "can't take acos of -2".

Revision 2914 - Directory Listing
Modified Wed Oct 13 02:41:33 2004 UTC (15 years, 3 months ago) by dpvc
Added support for useBaseTenLogs to make log() work like ln() or
log10() depending on the value in the course.conf file.

Also fixed a bug that caused the WeBWorK parameters not to be
copied into contexts by initCopy().

Revision 2912 - Directory Listing
Modified Wed Oct 13 01:35:51 2004 UTC (15 years, 3 months ago) by dpvc
Fixed typo in the comments.

Revision 2909 - Directory Listing
Modified Tue Oct 12 20:49:25 2004 UTC (15 years, 3 months ago) by dpvc
In Complex context, make sqrt() and log() of negative numbers return
their complex values.  Also make ^ and ** do the same with negative
bases.  These can be controlled by setting/clearing the
"negativeIsComplex" entry for these functions and operators.

Revision 2908 - Directory Listing
Modified Tue Oct 12 20:46:43 2004 UTC (15 years, 3 months ago) by dpvc
Report errors for powers of negative numbers rather than return 'nan'.
Don't allow 'nan' to be made into a Real object.

Revision 2907 - Directory Listing
Modified Tue Oct 12 20:44:20 2004 UTC (15 years, 3 months ago) by dpvc
In StandardPrecedence mode, make the precedence of function apply
match that in use by that AlgParser.

Revision 2900 - Directory Listing
Modified Tue Oct 12 00:52:47 2004 UTC (15 years, 3 months ago) by dpvc
Don't give coordinate hints during parallel vector checks.  Also fixed
a typo.

Revision 2855 - Directory Listing
Modified Sat Oct 2 11:55:31 2004 UTC (15 years, 3 months ago) by dpvc
added generic string-only context, and converted contextABCD and
contextTF to use it.

Revision 2842 - Directory Listing
Modified Wed Sep 29 15:47:30 2004 UTC (15 years, 3 months ago) by dpvc
Allow string constants to include spaces.

Revision 2832 - Directory Listing
Modified Mon Sep 27 17:47:04 2004 UTC (15 years, 3 months ago) by dpvc
Fix problem with TeX output of implicit multiplication between
items that would put two digits next to each other (like 2 3^2).

Revision 2824 - Directory Listing
Modified Thu Sep 23 21:31:41 2004 UTC (15 years, 3 months ago) by dpvc
Two new Parser contexts, one for matching problems involving answers
like A, B, C and D, the other for T/F answers.  These contexts have an
advantage over the standard str_cmp() checker in that it will give
additional error messages when the student enters an unrecognized answer.

Revision 2823 - Directory Listing
Modified Thu Sep 23 21:09:14 2004 UTC (15 years, 3 months ago) by dpvc
Fixed Parser so that you can replace the Formula class as well as the
other object types.

Revision 2803 - Directory Listing
Modified Sun Sep 19 15:11:08 2004 UTC (15 years, 4 months ago) by dpvc
The $Parser::class variable was being handled after the "use"
statements at the end, so had to put a BEGIN around it.

Revision 2802 - Directory Listing
Modified Sun Sep 19 14:43:32 2004 UTC (15 years, 4 months ago) by dpvc
Eliminated unneeded parentheses in TeX output when unary minus and
plus are used with fractions.

Revision 2801 - Directory Listing
Modified Sun Sep 19 14:41:57 2004 UTC (15 years, 4 months ago) by dpvc
More changes for the isZero and isOne checks.  (Missed this file when
I committed the others.)

Revision 2800 - Directory Listing
Modified Sun Sep 19 14:27:39 2004 UTC (15 years, 4 months ago) by dpvc
Added isZero and isOne checks for Parser::Value objects (i.e., for
constants within formulas).  These now correctly handle vector and
matrices, in particular.  The isOne and isZero checks are used in the
reduce() method to simplify formulas.

Revision 2799 - Directory Listing
Modified Sun Sep 19 11:49:32 2004 UTC (15 years, 4 months ago) by dpvc
Added a new flag to the Formula()->cmp answer checker that allows a
constant-valued formula to be evaluated and then use the checker for
the resulting type.  This is useful when you want the correct answer
for a numeric check to be shown in a symbolic form (like "pi/4")
rather than as a decimal number.  To do this, use

       Formula("pi/4")->cmp(eval=>1);

rather than Real(pi/4)->cmp, which would show the correct answer as
0.785398.  Note that Formula("pi/4")->cmp would also match against
pi/4, but it does it as a function rather than a number, so error
messages might be issued indicating that the checker is expecting a
formula that returns a number, rather than just a number; this might
be confusing to a student.  It would also accept answers like
"pi/4-x+x" as correct, whereas with eval=>1 this would produce an
error message saying that the answer was supposed to be a number not a
formula returning a number.

Similarly, if you want to show sqrt(2)/2 as the correct answer, use

     Context()->flags->set(reduceConstants=>0, reduceConstantFunctions=>0);
     Formula("sqrt(2)/2")->cmp(eval=>1);

The first line tells the parser not to automatically reduce
expressions that only involve constants, so that the value of the
formula in the second line will not be reduced to a decimal before
the cmp method is called.

Revision 2798 - Directory Listing
Modified Sun Sep 19 11:29:06 2004 UTC (15 years, 4 months ago) by dpvc
Make Formula()->eval return a Real (ie, aValue::Real object) rather
than a perl number.  That way, you can use $f->eval->cmp rather than
needing Real($f->eval)->cmp, and so on.

Also make Formula()->perl do the same, for consistency.

(This could have been accomplished by having the Parser::Number class
evaluate to a Real, but for efficiency during computation, we put
off making the Real object until the end.  It probably doesn't make
that big a difference, but every little bit helps.)

Revision 2797 - Directory Listing
Modified Sun Sep 19 01:16:10 2004 UTC (15 years, 4 months ago) by dpvc
File needed to reduction flags that was accidentally left out of the
previous commit.  Sorry!

Revision 2796 - Directory Listing
Modified Sun Sep 19 01:15:03 2004 UTC (15 years, 4 months ago) by dpvc
Added flags that control the reductions performed by
Formula()->reduce.  Each reduction operation can be individually
enabled or disabled in the context, and in the reduce() call itself.

More complex reductions need to be developed.

Revision 2795 - Directory Listing
Modified Sat Sep 18 23:16:37 2004 UTC (15 years, 4 months ago) by dpvc
Fixed typo in addParens method name.

Revision 2791 - Directory Listing
Modified Thu Sep 16 23:43:54 2004 UTC (15 years, 4 months ago) by dpvc
Don't reduce constants in the display of student answers (so they can
tell how the parser interprets their answer).  The drawback is that
the final number is not displayed.  (We may need to add more columns
to the results display.)

Revision 2790 - Directory Listing
Modified Thu Sep 16 23:03:03 2004 UTC (15 years, 4 months ago) by dpvc
Use extra parens in the string version of the student's answer, but
not in the professor's (unless the problem sets the showExtraParens
flag).

Revision 2789 - Directory Listing
Modified Thu Sep 16 22:24:32 2004 UTC (15 years, 4 months ago) by dpvc
Added context flags to control automatic reduction of operations that
involve only constant values.  The default is to combine constants,
but this can now be disabled.

Also added a new flag to control the addition of extra parentheses
that make string values painfully unambiguous (these are for
situations that students tend to get wrong).  By default this is
turned off (so that professor answers won't contain excessive
parentheses), but the answer checker will be made to turn this on for
student answers.

Finally, when extra parens are added to formulas, they alternate
between ( ) and [ ] to make it easier to read.

Revision 2788 - Directory Listing
Modified Thu Sep 16 22:19:59 2004 UTC (15 years, 4 months ago) by dpvc
Produce an error when attempting to auto-create a formula using a
function that has been removed from the current context.

Revision 2781 - Directory Listing
Modified Tue Sep 14 21:36:45 2004 UTC (15 years, 4 months ago) by apizer
Fixed bug with useBaseTenLog

Arnie

Revision 2772 - Directory Listing
Modified Sun Sep 12 11:11:47 2004 UTC (15 years, 4 months ago) by dpvc
Make partial credit in list answer checkers be the default (now that
WeBWorK can handle this).

Revision 2771 - Directory Listing
Modified Sat Sep 11 17:11:29 2004 UTC (15 years, 4 months ago) by dpvc
Fixed a bug with constants where the values were being cached so that
changes in the context were not being reflected in the formulas that
use them.

Revision 2768 - Directory Listing
Modified Fri Sep 10 23:55:31 2004 UTC (15 years, 4 months ago) by dpvc
When creating formulas from functions, don't evaluate even if the
formula is constant.  (This makes it possible to create automatically
create formulas even if they only contain constants.)

Revision 2757 - Directory Listing
Modified Fri Sep 10 14:50:14 2004 UTC (15 years, 4 months ago) by dpvc
No longer produces the message that there are too many answers if
hints are being shown about individual entries in a list.  (This gave
away the answer about which ones to remove.)

Revision 2756 - Directory Listing
Modified Fri Sep 10 14:48:35 2004 UTC (15 years, 4 months ago) by dpvc
Changed the error message produced for functions that have been
removed from the parser.  I hope this will be more appropriate for
students.

Revision 2746 - Directory Listing
Modified Wed Sep 8 02:00:52 2004 UTC (15 years, 4 months ago) by dpvc
Fixed error where AlgParser produces \sech and \csch, which are not
defined in TeX.  This fixes bug #665.

Revision 2733 - Directory Listing
Modified Sat Sep 4 20:45:31 2004 UTC (15 years, 4 months ago) by dpvc
This file defined an answer checker for lists of variable names
(ordered or unordered, and optionally enclosed in parentheses).  You
can use this answer checker for questions that give a system of
equations and ask which variables are the dependent and which the
independent variables, for example.

Revision 2732 - Directory Listing
Modified Sat Sep 4 20:42:45 2004 UTC (15 years, 4 months ago) by dpvc
This file provides an answer checker that determines whether two
students answers compose to form a given function.  The student
answers are not allowed to be the identity function, or a function
that is trivially generated from the composition.

See the comments within the file for details about how to use it.

Revision 2731 - Directory Listing
Modified Sat Sep 4 20:40:43 2004 UTC (15 years, 4 months ago) by dpvc
This file defines a NumberWithUnits class for that provides an answer
checker for numbers with units.  It uses the same units package that
the standard answer checkers use, but this will eventually be replaced
by a more complete Units class within the parser itself.  The class
produces a preview string in which the units show appropriately.

Revision 2730 - Directory Listing
Modified Sat Sep 4 20:31:55 2004 UTC (15 years, 4 months ago) by dpvc
This file defines a DifferenceQuotient class that provides an answer
checker for difference quotients.  These include a variable "dx" (or a
user specified one) that can be used as part of the formula, and the
student must simplify the answer at least enough to remove the dx from
the denominator.

Revision 2729 - Directory Listing
Modified Sat Sep 4 20:29:52 2004 UTC (15 years, 4 months ago) by dpvc
This file provides some convenient tools for generating random points
and vectors that are not the zero vector, plus some other misc. utilities.

Revision 2728 - Directory Listing
Modified Sat Sep 4 20:28:33 2004 UTC (15 years, 4 months ago) by dpvc
This file defines a ParametricLine class that provides an answser
checker for lines in any dimension given parametrically.  The answer
checker will recognize the line even if the point and direction vector
used by the student are not the same as the ones used by the
professor.

See the comments within the file for examples of how to use it.

Revision 2727 - Directory Listing
Modified Sat Sep 4 20:26:23 2004 UTC (15 years, 4 months ago) by dpvc
This macro file defines an ImplicitPlane (and inplicit line) class of
Parser object that provides an answer checker for planes (or
hyperplanes in any dimension) of the form ax + by + cz = d.  Students
can provide their answer in any (linear) form that is equivalent to
this.

The class accepts several formats for specifying the correct-answer plane.

Revision 2726 - Directory Listing
Modified Sat Sep 4 20:21:32 2004 UTC (15 years, 4 months ago) by dpvc
These files provide contexts for the Parser in which only limited
operations are allowed.  The LimitedNumeric context is analogous to
strict_num_cmp().  The other contexts are similar, but for the
indicated type of answer.  In the LimitedVector context, for example,
the student can enter vectors, and can perform numeric operations
within the coordinates of the vectors, but can't perform vector
operations like vector addition or cross product.

Revision 2701 - Directory Listing
Modified Sat Aug 28 15:53:09 2004 UTC (15 years, 4 months ago) by dpvc
Only convert (f(x))^2 to f^2(x) for specified functions f
(as marked in the Context).

Revision 2698 - Directory Listing
Modified Sat Aug 28 13:52:33 2004 UTC (15 years, 4 months ago) by dpvc
Add better error reporting in PG translator.  In particular, these
changes add two new features:

	1)  produce a full stack trace when a .pg file dies, and
	2)  convert (eval nnn) references to filenames, when
	    possible, in warn and die messages while processing a
	    .pg file.

There is also a change in the webwork tree that is needed to make this
all work, so be sure to apply updates in both trees.

Revision 2697 - Directory Listing
Modified Sat Aug 28 12:43:57 2004 UTC (15 years, 4 months ago) by dpvc
Two more minor TeX improvements.

Revision 2696 - Directory Listing
Modified Sat Aug 28 12:34:56 2004 UTC (15 years, 4 months ago) by dpvc
Improved TeX and string output in a number of situations.  Improved
use of parentheses to avoid things like x+-3.  Fixed wrong parentheses
in powers.  Display (sin(x))^2 as sin^2(x) in TeX output.

Revision 2692 - Directory Listing
Modified Fri Aug 27 21:49:36 2004 UTC (15 years, 4 months ago) by dpvc
Use the current context if the answer doesn't have one itself (like
with Value objects).

Revision 2688 - Directory Listing
Modified Fri Aug 27 19:42:59 2004 UTC (15 years, 4 months ago) by dpvc
Added in functMaxConstantOfIntegration support in the adaptive
parameter answer checking.  Also added a flag to the formula answer
checker that allows checking a formula up to a constant (for
integration problems).  This really just adds a new parameter to the
context and adds that to the formula, so there is nothing deep about
this.

	ANS(Formula("2x")->cmp(upToConstant=>1));

Finally, don't look for adaptive parameters if they aren't actually
used in the professor's formula (even if they are defined).

Revision 2687 - Directory Listing
Modified Fri Aug 27 00:28:27 2004 UTC (15 years, 4 months ago) by dpvc
Added ability to have linear adaptive parameters in the function
answer checker.  It only works for real-valued functions, though.
To use a parameter, use

       Context()->variables->add(a=>'Parameter');

and then use 'a' as a variable within your answer.  The student will
not be allowed to enter the parameter, but the professor will.

Note that the correct answer will show the full professor's answer,
including the parameters, even though the student can't type it.  Is
this the right behaviour?

Revision 2684 - Directory Listing
Modified Tue Aug 24 21:35:21 2004 UTC (15 years, 4 months ago) by dpvc
Added the makeUnion call that was removed earlier.  The AnswerChecker
for formulas sometimes called it (when the student's answer is constant).

Revision 2682 - Directory Listing
Modified Tue Aug 24 03:36:54 2004 UTC (15 years, 4 months ago) by dpvc
Fixed a bug with  sin^2 x  that introduced when I adjusted the
error report for implied multiplication.

Revision 2681 - Directory Listing
Modified Tue Aug 24 03:34:47 2004 UTC (15 years, 4 months ago) by dpvc
TeX mode now adds parentheses around fractions, when needed.

Revision 2680 - Directory Listing
Modified Tue Aug 24 03:33:30 2004 UTC (15 years, 4 months ago) by dpvc
Made string function look for a string field in teh definition of the
function as an override for its name. (This way, you can make asin
appear as arcsin or even sin^(-1) if you want).

Revision 2679 - Directory Listing
Modified Tue Aug 24 03:31:47 2004 UTC (15 years, 4 months ago) by dpvc
Fixed wrong error messages when operators are undefined in a context.

Revision 2678 - Directory Listing
Modified Mon Aug 23 23:55:37 2004 UTC (15 years, 4 months ago) by dpvc
Modified the parser so that the classes for the various object
constructors are stored in the context table rather than hard-coded
into the parser.  That way, you can override the default classes with
your own.  This gives you even more complete control to modify the
parser.  (You had been able to replace the definitions of operators,
functions and list-like objects, but could not override the behaviour
of numbers, strings, variables, and so on.  Now you can.)

This effects most of the files, but only by changing the name of the
calls that create the various objects.

There are also a couple of other minor fixes.

Revision 2676 - Directory Listing
Modified Mon Aug 23 05:00:16 2004 UTC (15 years, 4 months ago) by dpvc
Better highlighting for syntax error involving implied
multiplication.  (No highlighted had been done in the past.)

Revision 2675 - Directory Listing
Modified Mon Aug 23 04:59:05 2004 UTC (15 years, 4 months ago) by dpvc
Get the type right when evaluating an AbsoluteValue and obtaining a
Value object.

Revision 2674 - Directory Listing
Modified Mon Aug 23 04:58:00 2004 UTC (15 years, 4 months ago) by dpvc
Remove more lines in error messages produced while evaluation student
answers.

Revision 2673 - Directory Listing
Modified Mon Aug 23 01:21:27 2004 UTC (15 years, 4 months ago) by dpvc
Moved WW-specific routines from Parser.pm to WeBWorK.pm.
Changed error reporting when the error message was not generated by
the parser directly.  (The stack trace and line number references are
removed before the error is reported.)

Revision 2672 - Directory Listing
Modified Sun Aug 22 22:46:14 2004 UTC (15 years, 4 months ago) by dpvc
Added easy calls to disable/enable collections of functions or
individual functions in the current context.  So you can say

	   Parser::Context::Functions::Disable('Trig');

to disallow the use of trig functions, or

	   Parser::Context::Functions::Disable('Trig','Numeric');
	   Parser::Context::Functions::Enable('sqrt');

to disable trig and numeric functions (like log, exp, abs, etc) but
allow sqrt.

Note that disabling sqrt() does not disable x^(1/2) (this must be done
through disabling the ^ and ** operators), and disabling abs() does
not disable |x| (which must be done by removing the '|' definition
from the Context's parens list).

Revision 2671 - Directory Listing
Modified Sun Aug 22 21:18:06 2004 UTC (15 years, 4 months ago) by dpvc
Fixed some inconsistencies between handing of matrices within the
parser and Value packages.  Added a predefined Matrix context.

Revision 2670 - Directory Listing
Modified Sun Aug 22 16:06:28 2004 UTC (15 years, 4 months ago) by dpvc
Had the default granularity the wrong direction.

Revision 2669 - Directory Listing
Modified Sun Aug 22 15:42:50 2004 UTC (15 years, 4 months ago) by dpvc
Made the granularity of the test-point intervals be a parameter that
can be set on a global or variable-by-variable basis, so this is now
controlable from the .pg file.  For example:

            Context("Numeric")->variables->are(
              k=>{limits=>[1,10], resolution=>1},
              x=>{limits=>[-2,2], granularity=>1000},
            );

will make k be a variable that will only take on integer values
between 1 and 10, and x a variable that will take on one of 1000
different values evenly spaced between -2 and 2 (so resolution is
4/1000 in this case).

These parameters can also be set for an individual formula:

           $f = Formula("k^2-1");
           $f->{resolution} = 1;
           $f->{limits} = [0,10];

Revision 2668 - Directory Listing
Modified Sun Aug 22 02:55:38 2004 UTC (15 years, 4 months ago) by dpvc
Fixed TeX output of Matrices to use \array rather than \matrix for
matrices with formulas as entries (this had already been fixed for
constant matrices).  Made intervals produce formulas when of of the
endpoints is a formula.  Removed unneeded comment.

Revision 2667 - Directory Listing
Modified Sun Aug 22 02:51:53 2004 UTC (15 years, 4 months ago) by dpvc
Added support for dimension warnings in the answer checker for
formulas that return points, vectors or matrices.

Revision 2666 - Directory Listing
Modified Sun Aug 22 00:56:32 2004 UTC (15 years, 4 months ago) by dpvc
Formulas can now be compared even if their variables are complex
numbers, or even points or vectors!  This makes it possible to ask
students for complex functions like z^2+i and so on.

You can specify limits for variables either via
Context()->variables->set(x=>{limits=>[0,1]})  (for reals) or
Context()->variables->set(z=>{limits=>[[-2,2],[0,1]]}) (for complexes).
Similarly for points and vectors (where the number of sub arrays
depends on the dimension).  You can also give the limits for a
specific formula by assigning to its ->{limits} field:

    $f = Formula("sqrt(x-10)");
    $f->{limits} = [10,12];

There are now named variable types for 'Point2D', 'Point3D',
'Vector2D' and 'Vector3D', in addition to 'Real' and 'Complex'.
You can also specify a variable type by giving an explicit instance of
a value of the given type.  E.g.

    Context()->variables->add(x=>'Real',y=>0);     # two real variables
    Context()->variables->add(z=>'Complex',w=>i);  # two complexes
    Context()->variables->add(r=>Vector(0,0,0));   # a vector in R^3
    Context()->variables->add(X=>'Vector3D');      # a vector in R^3

There still needs to be more error checking in processing
user-supplied limits, but I'm not sure how much overhead is worth it.

Revision 2665 - Directory Listing
Modified Sun Aug 22 00:41:44 2004 UTC (15 years, 4 months ago) by dpvc
Made the default context be Numeric context rather than Full context.
Since there is only one variable in this context, it will speed up
function answer checking.  It will also encourage you to choose the
correct context explicitly.

Also changed Complex context to have z as the only variable.  If you
want x and y as reals, you need to add them in by hand.  Again, this
is for efficiency in answer checking.

Revision 2664 - Directory Listing
Modified Sat Aug 21 22:02:14 2004 UTC (15 years, 4 months ago) by dpvc
Added a file to perform WeBWorK-specific modifications to the
Parser/Value packages.  (I've tried to make these independent of
WeBWorK, so you can use them in other perl code if you want to.)

The parameters for fuzzy reals and some of the other parameters now
are taken from the pg->{ansEvalDefaults} values (as defined in
global.conf or course.conf).  More still needs to be done with this,
however.

Revision 2661 - Directory Listing
Modified Fri Aug 20 15:56:56 2004 UTC (15 years, 5 months ago) by dpvc
A number of fixes to make handing lists work better.  In particular,
you can now specify checks for whether the right kinds of parentheses
(or none at all) are used on the student's answer.  Some of the flags
for the list checker have been changed to accommodate this.

Revision 2660 - Directory Listing
Modified Fri Aug 20 15:52:32 2004 UTC (15 years, 5 months ago) by dpvc
A number of adjustments to get negative infinities to work better.
They used to be stored as separate Parser strings, but now they are
flagged versions of a single string.

All of the problems are really due to the fact that there is no
Infinity class in the Parser (only a Value version).  That should be
changed, but will require some work, and can be put off for now.

It would be best if the classes within the two packages would match up
nearly 1-to-1, but for historical reasons, they don't.  Since the
introduction of Real, String and Infinity classes to the Value
package, The Infinity class is the one main difference between the
two, and once that is fixed, everything needs to be looked over to
check for unnecessary complications due to the historical lack of classes
in one or the other package.

Revision 2658 - Directory Listing
Modified Fri Aug 20 11:17:06 2004 UTC (15 years, 5 months ago) by dpvc
Make blank patterns be ^$ (which should never match) rather than empty
(which always matches).  this fixes a problem where if a context has
no functions, for example, the parser would attempt to create function
calls to a function named ''.

Revision 2657 - Directory Listing
Modified Fri Aug 20 11:13:51 2004 UTC (15 years, 5 months ago) by dpvc
Handle trapped error messages that are not produced by the parser
error reporter (i.e., by bugs within the parser itself).  Also added
an error if implied multiplication is attempted when the operator for
it is not defined in the current context.

Revision 2656 - Directory Listing
Modified Fri Aug 20 02:13:38 2004 UTC (15 years, 5 months ago) by dpvc
We need to protect the HTML in the professor's answer so that if it
contains <, for example, it won't disappear.

Revision 2655 - Directory Listing
Modified Fri Aug 20 02:11:50 2004 UTC (15 years, 5 months ago) by dpvc
Fixed typo.

Revision 2654 - Directory Listing
Modified Fri Aug 20 02:11:08 2004 UTC (15 years, 5 months ago) by dpvc
Avoid possible infinite recursion in promotePrecedence() when special
precedence is used.

Revision 2653 - Directory Listing
Modified Thu Aug 19 17:31:18 2004 UTC (15 years, 5 months ago) by dpvc
Fixed error with handling of +infinity and -infinity.
(They had been defined as strings, but now we can let the + and -
operators handle them).

Revision 2650 - Directory Listing
Modified Thu Aug 19 14:23:00 2004 UTC (15 years, 5 months ago) by dpvc
Added Parser::Number::NoDecimals() function that causes the parser to
give an error message when the student types a decimal number.  This
means the student must enter fractions as fractions, or values like
sqrt(2) or pi/4 symbolically not numerically.

Revision 2649 - Directory Listing
Modified Thu Aug 19 14:19:32 2004 UTC (15 years, 5 months ago) by dpvc
Fixed an error in the generation of regexp patterns for the various
data types.

Revision 2648 - Directory Listing
Modified Thu Aug 19 12:38:47 2004 UTC (15 years, 5 months ago) by dpvc
The answer checkers now work with subclasses of Formulas that are not
part of the Value:: package tree itself (we call Value::isFormula()
rather than checking the class directly).

I also removed the various cmp_* flags that stored method names as
they ended up not needing to be used (they were intended as a means of
overriding the default method names, but subclassing turned out to be
a better approach).

I moved some initialization of the answer checker out of the anonymous
subroutine that is installed in the checker and just have that
subroutine call the correct answer's main checker (which I renamed).

Finally, I changed the student_ans value to be an HTMLized version of
the student answer, since the student could include things like < in
his answer (e.g., for vectors), in which case his whole answer might
disappear.  I wonder if this couldn't be handled better at a higher
level, as it seems wrong to make the student_ans be HTML rather than
the parsed string.  I originally thought Problem.pm could do the
protecting of HTML special characters, but this won't work without
additional changes, since some answer checkers put HTML into
student_ans to mark sytanx errors in the student answer, and you DON'T
want to protect those HTML characters.  The student_ans field is
probably being misused in this, and there might want to be another
field that gets used by Problem.pm in place of student_ans (which can
be HTML protected) when it is non-empty; say student_HTML or something
like that.  The answer checkers could use that field if it wants to
add HTML to the student answer, and student_ans otherwise, with the
assurance that it's HTML characters will be protected.  That way, if a
second answer checker calls the first (like some list checkers do),
then the second checker doesn't have to worry about removing HTML from
the student ans, and doesn't ahve to wonder whether the student_ans
actually contains an error message or syntax markings rather than the
actual student answer.

Revision 2647 - Directory Listing
Modified Thu Aug 19 12:18:56 2004 UTC (15 years, 5 months ago) by dpvc
Context() now accepts a reference to an actual Context object rather
than a name of a predefined context, and will switch to that.

Revision 2646 - Directory Listing
Modified Thu Aug 19 12:16:41 2004 UTC (15 years, 5 months ago) by dpvc
Make it possible to create subclasses of objects in the value package
that are not actually in the Value:: package tree.  This makes it
possible to have .pl files (that are run via loadMacros) that create
new Value object classes that are local to the problem rather than
global to the system.  (With mod_perl, if a .pl file added to the
Value:: tree itself, the results would be persistent, and this could
adversely affect future problems processed by the same httpd child
process.  It could lead to "redefined subroutine" errors, or worse.)
This provides a safe way to extend the parser on a problem-specific
basis.

This technique is used in the line and plane answer checkers (coming
soon), for example.  If such a checker becomes widely used, it can
always be added into the Value:: tree at a later time.

Revision 2645 - Directory Listing
Modified Thu Aug 19 12:02:15 2004 UTC (15 years, 5 months ago) by dpvc
Make sure equality always returns a defined value, and
put spaces around the equal sign in string output.

Revision 2644 - Directory Listing
Modified Thu Aug 19 12:01:12 2004 UTC (15 years, 5 months ago) by dpvc
Make sure loadMacros() doesn't try to load these files more than once.

Revision 2643 - Directory Listing
Modified Thu Aug 19 11:55:56 2004 UTC (15 years, 5 months ago) by dpvc
Use the standard precedences rather than the experimental ones by
default.  The professor will need to specificaly request the
non-standard ones, for now.

Revision 2634 - Directory Listing
Modified Tue Aug 17 15:21:58 2004 UTC (15 years, 5 months ago) by dpvc
Changed the string used for the student answer to be taken from the
unevaluated formula rather than the fully-evaluated one.  This leaves
constants unreplaced, for one thing.

Currently the parser combines constants automatically during the parse
[which should be controllable by a flag], so student answers that
produce numbers are fully evaluated at this point already, except for
constant substitution.  This could be changed so that even for
numberic results, the student sees the parsed expression (rather than
the numeric result), which might help them identify where they and the
parser differ in their interpretation.  It is still nice to see the
final computed result, however, but there is no place to show the
parsed input as well as the final result.  One solution would be to
add another column (wasting space).  Another would be to make the
value shown be "parsed-value = computed-value" when they are not the
same thing.  A bit ugly, but works within the current framework.

Revision 2632 - Directory Listing
Modified Tue Aug 17 12:05:18 2004 UTC (15 years, 5 months ago) by dpvc
Fixed typo in name of random generator.

Revision 2629 - Directory Listing
Modified Tue Aug 17 02:01:27 2004 UTC (15 years, 5 months ago) by dpvc
Fixed a number of minor problems with creating perl functions from
formulas (this is done automatically as part of the function answer
checker, so is showing up now that I have that checker in place).

Also improved error messages in the function answer checker, and fixed
a bug when students enter a constant list or union when the answer
checker expects formulas.

Revision 2628 - Directory Listing
Modified Mon Aug 16 21:41:05 2004 UTC (15 years, 5 months ago) by dpvc
Allow parser "constants" to be (in reality) formulas.  That way, for
example, you can defined T, N and B to be the formulas for the unit
tangent, normal and binormal of a space curve (as functions of "t")
and the student can write anwers in terms of T, N and B (without
having to compute them).

You could have created FUNCTIONS T(t), N(t) and B(t), and added them
to the parser to get almost the same effect, but the students would
have had to include the "(t)".  (If you want that, go ahead and do it
that way.)

Revision 2627 - Directory Listing
Modified Mon Aug 16 20:22:16 2004 UTC (15 years, 5 months ago) by dpvc
Removed unwanted side-effects of some type-match checks, and moved the
ignoreStrings flag so that it is available for the checkers of ANY type.

Revision 2626 - Directory Listing
Modified Mon Aug 16 19:44:26 2004 UTC (15 years, 5 months ago) by dpvc
One more fix for handling intervals properly (I think it's really
right this time).  Also, named constants that end in numbers will
produce TeX output with the number as a subscript (this was already
true for variable names).

Revision 2625 - Directory Listing
Modified Mon Aug 16 18:35:12 2004 UTC (15 years, 5 months ago) by dpvc
Added string comparison to all Value object classes (to compare the
string value of an object to another string).

Overloaded perl '.' operator to do dot product when the operands are
formulas returning vectors.  (Part of the auto-generation of
formulas).

A few improvements to real and complex class output results.

Made Union class slightly more robust and removed need for makeUnion
method other than in the Union itself.

Revision 2624 - Directory Listing
Modified Mon Aug 16 13:44:45 2004 UTC (15 years, 5 months ago) by dpvc
Added support for unorderd list or formulas with partial credit.
Fixed type mismatch reporting in formula answer checker.
Fixed an error with Unions producing incorrect perl versions under
some circumstances.

Revision 2622 - Directory Listing
Modified Sun Aug 15 22:46:57 2004 UTC (15 years, 5 months ago) by dpvc
Created the first draft of the Parser's function answer checker.  Some
work still needs to be done, in particular, type mismatches are not
being reported, and lists are being processed only as ordered lists
with no partial credit.

This doesn't implement everything from fun_cmp.  In particular, there
is no support for parameter matching at the moment.  This will have to
be added, but I'm not quite sure how to do it when the function's
return value is not a real number (e.g., an interval).

On the other hand, this checker is more forgiving about domain errors:
if tries a point where the professor's function is not defined, it
ignores that one and looks for another (until it decides it can't find
one).  Once it has these points, it tries them on the student's
answer, and if the student's function is undefined, then the student
answer is wrong (since it is not defined somewhere that the
professor's funciton is).  This avoids the "Error evaluating student
function at ..." messages, which just confused most students anyway.

Revision 2621 - Directory Listing
Modified Sun Aug 15 17:05:41 2004 UTC (15 years, 5 months ago) by dpvc
Improved error messages, particularly when the student enters a
formula in an answer that should be constant, and also for incorrect
answers in lists of answers.  There are a few other miscellaneous output
improvements as well.

Revision 2620 - Directory Listing
Modified Sun Aug 15 12:02:05 2004 UTC (15 years, 5 months ago) by dpvc
Had to put back the global context variable after all.  :-(
It gets reset in Parser.pl, so it should be OK even with mod_perl.

Revision 2619 - Directory Listing
Modified Sun Aug 15 00:45:46 2004 UTC (15 years, 5 months ago) by dpvc
Modified Context() function so that it no longer uses a global package
variable for storing the user's context table.

Revision 2617 - Directory Listing
Modified Sun Aug 15 00:13:38 2004 UTC (15 years, 5 months ago) by dpvc
The Union answer checker now uses the generic List checker, so that it
will be able to produce partial credit and hints about which Intervals
are correct.

Revision 2616 - Directory Listing
Modified Sat Aug 14 21:29:21 2004 UTC (15 years, 5 months ago) by dpvc
Added an equality operator (not active initially) that can be used for
things like equations of planes and so on.  I'm working on the answer
checker for that.

Revision 2615 - Directory Listing
Modified Sat Aug 14 21:27:45 2004 UTC (15 years, 5 months ago) by dpvc
*** empty log message ***

Revision 2612 - Directory Listing
Modified Sat Aug 14 19:29:42 2004 UTC (15 years, 5 months ago) by dpvc
Fixed some bugs in the handle of the context in ->string and ->TeX
methods of Value objects.

Revision 2611 - Directory Listing
Modified Sat Aug 14 15:59:35 2004 UTC (15 years, 5 months ago) by dpvc
Fixed a typo in one of the parser answer checkers.  Added a line that
was incorrecctly removed in the parser.

Revision 2610 - Directory Listing
Modified Sat Aug 14 13:55:54 2004 UTC (15 years, 5 months ago) by dpvc
The class file for the Value::String object.  (Forgot to add it before
the last commit.  Sorry!)

Revision 2609 - Directory Listing
Modified Sat Aug 14 13:54:52 2004 UTC (15 years, 5 months ago) by dpvc
Added a String type to the Value package.  Mostly this is to make it
possible to generate an answer checker for it that uses the parser.
It also makes it more consistent for handling things like stringify,
especially when they are recursively called internally.

Added new default strings "NONE" and "DNE", since these get used a
lot.

Modified how the default parameters are set up for the answer
checkers, and how the answer checker reports the expected answer type
in type mismatch error messages.

Revision 2608 - Directory Listing
Modified Sat Aug 14 13:49:56 2004 UTC (15 years, 5 months ago) by dpvc
Added Infinity function (similar to i and pi) for creating infinity
constants.

Revision 2607 - Directory Listing
Modified Sat Aug 14 11:26:49 2004 UTC (15 years, 5 months ago) by dpvc
Allow unary + and - to work on infinities.

Revision 2606 - Directory Listing
Modified Sat Aug 14 11:25:47 2004 UTC (15 years, 5 months ago) by dpvc
Can now specify that the objects stringify themselfs in their TeX
forms rather than their answer-string forms.  This makes it easier to
use the objects in the text of a problem (without having to call ->TeX
explicitly each reference).

Use

       Context()->texStrings

to start outputting TeX strings, and

      Context()->normalStrings

to switch back.

Revision 2605 - Directory Listing
Modified Sat Aug 14 02:50:18 2004 UTC (15 years, 5 months ago) by dpvc
Incorporated infinities into Parser package better.  They have been
stored as String objects (with extra data) in the parser, and I've
left it that way, but now they convert to/from Vallue::Infinity
objects correctly, and these are used for generating the output.

Also added the Infinity answer checker, and adjusted the error
messages produces by type mismatches in the answer checkers and
elsewhere.

Revision 2604 - Directory Listing
Modified Fri Aug 13 23:49:16 2004 UTC (15 years, 5 months ago) by dpvc
Fixed some output issues with intervals and unions.

Revision 2603 - Directory Listing
Modified Fri Aug 13 23:01:07 2004 UTC (15 years, 5 months ago) by dpvc
Added an Infinite object class for the Value package.  Still need to
add it to the Parser package.

Revision 2602 - Directory Listing
Modified Fri Aug 13 22:57:27 2004 UTC (15 years, 5 months ago) by dpvc
Changed the way the parser checks to see if it is loaded.

Revision 2601 - Directory Listing
Modified Fri Aug 13 19:06:09 2004 UTC (15 years, 5 months ago) by dpvc
Added ability to report incorrect coordinates in point and vector
answers, and incorrect endpoints and endpoint types in intervals.
Separated these kinds of checks from the typeMatch check, where they
didn't really belong.

Added ability to specify intervals and unions as strings in Interval()
and Union(), which makes it easier to make constants of these types.

There are still problems comparing intervals that contain infinities;
I really need to make the infinity object to solve this, so have put
off trying to fix that for now.

Revision 2600 - Directory Listing
Modified Fri Aug 13 14:39:16 2004 UTC (15 years, 5 months ago) by dpvc
Handle list entries that are not Value objects better.

Revision 2599 - Directory Listing
Modified Fri Aug 13 14:19:23 2004 UTC (15 years, 5 months ago) by dpvc
The List object's answer checker is now considerably improved.  It
will allow you to specify an unorderd or ordered check, and whether to
print various kinds of hints for wrong answers.

The checker can return partial credit, but WW doesn't deal well with
this at the moment (some small changes to Problem.pm can take care of
that).  Partial credit should be based on $showPartialCorrectAnswers,
but it is disabled for now.

The list answer checker probably still needs some work, especially
with non-numeric lists.

Revision 2597 - Directory Listing
Modified Fri Aug 13 11:38:22 2004 UTC (15 years, 5 months ago) by dpvc
Added answer checker for parallel vectors.
Added option to number checker to have it not report type mismatches
for the known strings (like 'infinity').  (Really need a class for
infinities, and a Value.pm class for strings.)

Revision 2596 - Directory Listing
Modified Thu Aug 12 23:11:32 2004 UTC (15 years, 5 months ago) by dpvc
Have parser handle infinities better.

Revision 2594 - Directory Listing
Modified Thu Aug 12 20:17:18 2004 UTC (15 years, 5 months ago) by dpvc
Fixes for handling intervals better.  In particular, deal better with
ambiguous situations, like (1,2) that could be a point.

You can use [a,a] to specify the single point a.  I'd like to make {a}
represent this (and maybe even {a,b,c} to form finite sets), but this
would interfere with the use of { and } as alternative parentheses.
(Does anyone really use these?)

Do we need a cross product for intervals (and sets) as a means of
representing regions in R^2 (or higher)?

Revision 2593 - Directory Listing
Modified Thu Aug 12 16:48:52 2004 UTC (15 years, 5 months ago) by dpvc
This is a preliminary attempt at adding answer checkers that use the
parser.  If you have a parser object (like a formula or a vector), you
can use the ->cmp method to get an answer checker appropriate for the
object.  For example:

	 Context('Vector');
	 $v = Vector(1,2,3);
	 #  print text of problem
	 ANS($v->cmp);

would produce an answer checker that matched against the vector <1,2,3>.
Most of the parameters are set in the Context, but additional ones can
be passed to the checker (this still needs work).

See the sample problems for more examples.

The checkers for Reals, Complexes, Points, Vectors, Matrices and
Intervals work pretty well.  The ones for List and Union objects need
more work, as they only do an ORDERED check at the moment (the student
answers must be in the same order).  This needs to be fixed.
The checker for Formula objects (which corresponds to fun_cmp) still
needs to be written.

Revision 2592 - Directory Listing
Modified Thu Aug 12 16:40:47 2004 UTC (15 years, 5 months ago) by dpvc
A number of small fixes.  Most were to fix minor bugs in string and
TeX output, particulary for the various list-based objects (like
vectors, intervals, etc.).  There were also some bug fixes in the
comparison routines.  Some additional checks were added for valid
intervals when the coordinates are formulas.

Revision 2590 - Directory Listing
Modified Wed Aug 11 18:02:44 2004 UTC (15 years, 5 months ago) by dpvc
Added Real() command to create fuzzy reals.

Revision 2583 - Directory Listing
Modified Tue Aug 10 11:22:19 2004 UTC (15 years, 5 months ago) by dpvc
Fixed generation of LaTeX version of sqrt(...).

Revision 2580 - Directory Listing
Modified Mon Aug 9 21:38:58 2004 UTC (15 years, 5 months ago) by dpvc
Forgot to add this file.  It implements the "fuzzy real" class.

Revision 2579 - Directory Listing
Modified Mon Aug 9 21:38:01 2004 UTC (15 years, 5 months ago) by dpvc
Significant update to new parser.

New features include:

  Better control over format of vector output (you can now
    specify ijk-format rather than <...> format)

  "Fuzzy" reals, where the relations like == return true when the
    two values are "close enough".  (This is controlable using
    parameters similar to those used in NUM_CMP).

  The fuzzy reals are now used in vectors/points/matrices/complexes/intervals
    and so on so that their relations will also be fuzzy.  E.g.,
    (1E-13,2) == (0,3) will be true, and norm(Vector(0,1E-13)) will
    equal 0.

  The two main portions of the parser (the Parser and Value packages)
    now share a common context object for configuration purposes.

Revision 2576 - Directory Listing
Modified Wed Aug 4 20:52:28 2004 UTC (15 years, 5 months ago) by dpvc
Make Parser work with PGauxiliaryFunctions.pl, and add the macro files
needed to initialize the parser.

Revision 2574 - Directory Listing
Modified Wed Aug 4 20:23:11 2004 UTC (15 years, 5 months ago) by dpvc
Make Parser live nicely with Complex1.pm.

In particular, make the i() function determine whether it should
call the Complex::i() function or the Parser version.

Revision 2558 - Directory Listing
Modified Wed Jul 28 20:32:33 2004 UTC (15 years, 5 months ago) by sh002i
merged changes from rel-2-1-a1 -- stop using that branch.

Revision 2518 - Directory Listing
Modified Fri Jul 16 01:32:52 2004 UTC (15 years, 6 months ago) by gage
Will create the tempDirectory if it is missing.

this is useful if, for example, you switch the tmp directory from
webwork2/courses/courseName/html/tmp  to something like

/ww/htdocs/tmp/courseName

You don't want to create a courseName node for every course, you would
prefer to create only /ww/htdocs/tmp

the current version will create the node courseName if it doesn't exist
(or the name tmp in the first example) but will not create files
higher up the tree.

Revision 2488 - Directory Listing
Modified Sun Jul 11 21:36:26 2004 UTC (15 years, 6 months ago) by gage
Added better error messages.  Removed and extraneous slash.

Revision 2469 - Directory Listing
Modified Thu Jul 8 15:29:45 2004 UTC (15 years, 6 months ago) by apizer
Create equations directory if it doesn't exist.  All directories under
tmp should be recreated if they don't exist.

Arnie

Revision 2461 - Directory Listing
Modified Wed Jul 7 21:26:52 2004 UTC (15 years, 6 months ago) by apizer
Change permission of tmp files so that they can be removed.

Arnie

Revision 2445 - Directory Listing
Modified Tue Jul 6 21:21:20 2004 UTC (15 years, 6 months ago) by jj
Allow psvn to equal 0.  It could happen in situations where a problem
isn't really assigned to the person.

Revision 2443 - Directory Listing
Modified Tue Jul 6 15:16:51 2004 UTC (15 years, 6 months ago) by jj
Allow new option for image.  extra_html_tags are added to the img tag of the
image.  Allows you to control the vertical alignment of an image.

Revision 2420 - Directory Listing
Modified Sat Jun 26 21:56:44 2004 UTC (15 years, 6 months ago) by jj
Most of the work for adjusting vertical alignment of images is here.

Revision 2409 - Directory Listing
Modified Fri Jun 25 16:27:55 2004 UTC (15 years, 6 months ago) by jj
Allow option of not using the cache.  If its path is the empty string, then
we just return the md5 hash of the latex string followed by a 1.

Revision 2400 - Directory Listing
Modified Fri Jun 25 12:32:14 2004 UTC (15 years, 6 months ago) by dpvc
Fixed error in ANS_NUM_TO_NAME.

Revision 2396 - Directory Listing
Modified Thu Jun 24 22:07:22 2004 UTC (15 years, 6 months ago) by dpvc
Moved the <BR> in std_print_q from the beginning of a line to the end
of a line.  This prevents unexpected initial blank lines.

Revision 2393 - Directory Listing
Modified Thu Jun 24 21:01:23 2004 UTC (15 years, 6 months ago) by dpvc
Removed the experimental Parser-based implementations of i(), j() and k().
(sorry about that).

Revision 2392 - Directory Listing
Modified Thu Jun 24 21:00:26 2004 UTC (15 years, 6 months ago) by dpvc
Removed skip and rule from problem header generated in TeX mode here,
and let the snippets handle it (they were producing redundent rules).

Also removed some unwanted spaces in htmllink().

(Accidentally committed experimental change to dangerousMacros.pl, and
don't know how to prevent it at this point, so I'll commit a change
back to the original in a moment.)

Revision 2389 - Directory Listing
Modified Thu Jun 24 18:13:33 2004 UTC (15 years, 6 months ago) by dpvc
Removed extra spaces from around dvipng images.

(These can cause bad line breaks, e.g. between mathematics and the
punctuation that follows.)

Revision 2370 - Directory Listing
Modified Wed Jun 23 01:19:15 2004 UTC (15 years, 6 months ago) by sh002i
moved DISPLAY_MODE_FAILOVER into this file

Revision 2369 - Directory Listing
Modified Wed Jun 23 01:18:58 2004 UTC (15 years, 6 months ago) by sh002i
ImageGenerator is now using WeBWorK::Constants

Revision 2363 - Directory Listing
Modified Tue Jun 22 18:03:07 2004 UTC (15 years, 6 months ago) by jj
When using the imageCache (which is always), put images into subdirectories
based on the first two characters of their md5 hash.

Revision 2345 - Directory Listing
Modified Thu Jun 17 20:02:12 2004 UTC (15 years, 7 months ago) by apizer
Changed pacckage name from strict to ww_strict per Sam's suggestion
to prevent redefining warnings.

Arnie

Revision 2292 - Directory Listing
Modified Fri Jun 11 16:40:44 2004 UTC (15 years, 7 months ago) by dpvc
Fixed a bug in jsMath mode where it would not display < (when it looked like
part of a tag).

Also, removed unwanted spaced around input box.

Revision 2277 - Directory Listing
Modified Tue Jun 8 02:06:32 2004 UTC (15 years, 7 months ago) by sh002i
Reformatted the FUNCTION_CMP subroutine to make it more readable. Also,
one functional change:

< (defined ($inputs_ref->{$prev_ans_label} and $inputs_ref->{$prev_ans_label} =~/\S/) )
> (defined $inputs_ref->{$prev_ans_label} and $inputs_ref->{$prev_ans_label} =~/\S/)

I think the latter was what was intended.

Revision 2274 - Directory Listing
Modified Mon Jun 7 23:53:45 2004 UTC (15 years, 7 months ago) by sh002i
got rid of remaining calls to "wwerror". Fixes bug #530.

Revision 2270 - Directory Listing
Modified Mon Jun 7 11:52:47 2004 UTC (15 years, 7 months ago) by dpvc
Removed redundant HTML_jsMath check.

Revision 2267 - Directory Listing
Modified Mon Jun 7 01:34:34 2004 UTC (15 years, 7 months ago) by dpvc
Added jsMath support to these files.

Basically, HTML_jsMath should do whatever HTML_dpng mode does.  I simply included
it HTML_jsMath every time HTML_dpng appeared.

Revision 2253 - Directory Listing
Modified Sat Jun 5 16:13:33 2004 UTC (15 years, 7 months ago) by jj
Allow on-the-fly graphics in jsmath and asciimath modes.

Revision 2243 - Directory Listing
Modified Wed Jun 2 20:18:48 2004 UTC (15 years, 7 months ago) by jj
Fixed bug which caused some debug output to always appear.

Revision 2232 - Directory Listing
Modified Mon May 31 15:44:43 2004 UTC (15 years, 7 months ago) by jj
Re-use on-the-fly graphs, unless problem seed has change, source file has changed, or the problem is being rendered without being part of a real set.

Revision 2215 - Directory Listing
Modified Mon May 24 21:24:41 2004 UTC (15 years, 7 months ago) by jj
Allow default size of on the fly graphics to be set in global.conf, and make pop-ups of those graphs have windows closer to the size of the graph.  Also, pop-ups always make a new window - important for problems which make you compare two or more popped up graphs.

Revision 2206 - Directory Listing
Modified Mon May 24 17:51:44 2004 UTC (15 years, 7 months ago) by jj
Made on the fly graph names use problem seed rather than psvn.  It is a better identifier for pages like SetMaker.  Also made image names workable for set names containing periods (for the day when set names are free to contain periods).

Revision 2201 - Directory Listing
Modified Mon May 24 02:32:45 2004 UTC (15 years, 7 months ago) by dpvc
update to asciimath for MSIE.

Revision 2199 - Directory Listing
Modified Mon May 24 01:59:53 2004 UTC (15 years, 7 months ago) by dpvc
Support for asciimath.

Added preliminary support for asciimath rendering.  You must use a
MathML-enabled browser.

Revision 2193 - Directory Listing
Modified Mon May 24 01:05:03 2004 UTC (15 years, 7 months ago) by sh002i
failover data now passed in via %envir.

Revision 2173 - Directory Listing
Modified Sun May 23 01:33:22 2004 UTC (15 years, 7 months ago) by jj
Added helpLink for standard help pages in pg files.

Revision 2167 - Directory Listing
Modified Sat May 22 22:32:43 2004 UTC (15 years, 7 months ago) by gage
Moved be_strict after package main;

Revision 2166 - Directory Listing
Modified Sat May 22 22:16:20 2004 UTC (15 years, 7 months ago) by dpvc
Files needed for jsMath display mode.

Revision 2164 - Directory Listing
Modified Sat May 22 22:10:30 2004 UTC (15 years, 7 months ago) by gage
Moving ww_strict.pm forward to 5.8.3 compatible version
with require Carp; commented out

Revision 2163 - Directory Listing
Modified Sat May 22 21:34:58 2004 UTC (15 years, 7 months ago) by gage
Moved ww_strict.pm back to be identical with strict.pm from perl 5.6

Revision 2158 - Directory Listing
Modified Sat May 22 20:48:51 2004 UTC (15 years, 7 months ago) by gage
We are now using ww_strict.pm instead of strict.pm in be_strict;

Revision 2157 - Directory Listing
Modified Sat May 22 20:46:20 2004 UTC (15 years, 7 months ago) by gage
We are using our own version of strict.pm that has a require Carp;  commented out.
This is included in be_strict which is used to implement strict within PG macro files
which need to be evaluted inside the Safe compartment

Revision 2155 - Directory Listing
Modified Sat May 22 18:04:23 2004 UTC (15 years, 7 months ago) by jj
Moved nicestring to PGbasicmacros.

Revision 2153 - Directory Listing
Modified Sat May 22 15:53:00 2004 UTC (15 years, 7 months ago) by gage
Removed warning messages.  The macroDirectory and courseScripts directory are now defined from the %envir
variable which is shared directly with the new Safe compartment rather than via calls to $main::macroDirectory
which seemed to be unstable in some instances.  I've left the FIXME sign in place just in case there
are still problems.

Revision 2151 - Directory Listing
Modified Sat May 22 01:23:17 2004 UTC (15 years, 8 months ago) by gage
Roll back the previous changes.  They were added to HEAD instead of to the experimental branch.

Revision 2150 - Directory Listing
Modified Sat May 22 01:19:11 2004 UTC (15 years, 8 months ago) by gage
Experimental refactorization of answer evaluators will take place on this branch.

Revision 2144 - Directory Listing
Modified Fri May 21 23:58:13 2004 UTC (15 years, 8 months ago) by apizer
Removed old commented out code dealing with PGsort.

Arnie

Revision 2143 - Directory Listing
Modified Fri May 21 23:56:48 2004 UTC (15 years, 8 months ago) by apizer
Use the new PGsort which uses a true/false compare (e.g. < or lt )
rather than a -1,0,1 compare (e.g. <=> or cmp ).

Arnie

Revision 2142 - Directory Listing
Modified Fri May 21 23:54:00 2004 UTC (15 years, 8 months ago) by apizer
Replaced PGsort with a version that uses quick sort.  This fixes the
problem the old PGsort had with Perl compiled with ithreads.

Arnie

Revision 2135 - Directory Listing
Modified Fri May 21 01:34:28 2004 UTC (15 years, 8 months ago) by sh002i
Modified DVIPNG_ARGS to work with dvipng >= 1.0.

Revision 2061 - Directory Listing
Modified Sun May 9 17:45:41 2004 UTC (15 years, 8 months ago) by gage
Modifications to PGbasicmacros and PGanswermacros which check whether a function answer
is the same as the function answer submitted previously.  Gives warning message
if the same incorrect answers is submitted twice in a row.  The functions must
both compile in order to recognize that they are the same answer.  Two syntactically
incorrect entries will not be recognized as equivalent, even if they are in some sense.

Revision 2060 - Directory Listing
Modified Sun May 9 17:43:32 2004 UTC (15 years, 8 months ago) by gage
Cosmetic fixes to code layout.

Revision 2057 - Directory Listing
Modified Sat May 8 22:53:03 2004 UTC (15 years, 8 months ago) by gage
Preliminary changes that may eventually allow us to solve the be_strict problem for 5.8.0

Revision 2056 - Directory Listing
Modified Sat May 8 22:51:38 2004 UTC (15 years, 8 months ago) by gage
Updating answer evaluators in PGanswermacros.pl

Beginning to include code that will allow us to
check whether the current answer is the same
as the one submitted previously.

Revision 1964 - Directory Listing
Modified Thu Apr 22 14:39:28 2004 UTC (15 years, 8 months ago) by jj
Added convention to beginproblem that point value of "" means that we don't
print the point value at all.  It will also supress printing of the filename
if someone is supposed to have filenames printed, which is appropriate for
the one known time this convention is used.

Revision 1943 - Directory Listing
Modified Sun Apr 4 20:05:34 2004 UTC (15 years, 9 months ago) by jj
Synched with ASU version.  Defunct functions deleted, new functions added,
and documentation added.

Revision 1941 - Directory Listing
Modified Sun Apr 4 15:56:59 2004 UTC (15 years, 9 months ago) by jj
WW 2 didn't like the top line.  Inserting a comment seems to fix it.  Also
corrected a typo.

Revision 1932 - Directory Listing
Modified Sat Apr 3 15:44:55 2004 UTC (15 years, 9 months ago) by jj
Added support for useBaseTenLog for ww2.

Revision 1896 - Directory Listing
Modified Wed Mar 17 00:45:28 2004 UTC (15 years, 10 months ago) by gage
Changed the naming of arrays from ArRaY[0,0,0] to ArRaY__0:0:0:__

This involved changes in PG.pl and PGmorematrixmacros (ans_array_filter)

Made other cosmetic fixes to code.  Added names to many filters to help with
debugging.  It seems to work for now.

Revision 1834 - Directory Listing
Modified Thu Mar 4 17:41:06 2004 UTC (15 years, 10 months ago) by gage
Added comments

Revision 1831 - Directory Listing
Modified Thu Mar 4 13:06:32 2004 UTC (15 years, 10 months ago) by gage
Changed documentation spacing

Revision 1812 - Directory Listing
Modified Mon Feb 16 20:34:01 2004 UTC (15 years, 11 months ago) by gage
This is a new attempt to fix the problem that there was no
preview string if the units were incorrect.  The previous fix
caused difficulties if strings were entered for numerical answers.

The new code has been added to the subroutine fix_answers_for_display
which already performed answer cleanup of various kinds.

Revision 1797 - Directory Listing
Modified Thu Feb 12 20:26:26 2004 UTC (15 years, 11 months ago) by toenail
Reordered pre-filters in NUM_CMP to allow for latex previews of answers with no units

Revision 1791 - Directory Listing
Modified Thu Feb 12 14:23:36 2004 UTC (15 years, 11 months ago) by gage
Added RECORD_FORM_DATA for making sticky form data which
is not specifically related to answers.

Revision 1785 - Directory Listing
Modified Mon Feb 9 17:18:39 2004 UTC (15 years, 11 months ago) by gage
Modifications to checkbox_cmp to include preview_latex_string.

this completes the squashing of bug #400

Revision 1784 - Directory Listing
Modified Mon Feb 9 17:09:06 2004 UTC (15 years, 11 months ago) by gage
Made changes to the check box macros so that they will remain
sticky when more than one check box is checked.
Involves splitting a null separated string ( or perhaps converting
a reference to an array).  uses a new subroutine contained_in(elem,
array_or_arrray_ref_or_null_separated_string)

this resolves part of bug #400

--Mike

Revision 1780 - Directory Listing
Modified Fri Feb 6 02:55:55 2004 UTC (15 years, 11 months ago) by gage
Corrected format of one line.

--Mike

Revision 1779 - Directory Listing
Modified Fri Feb 6 02:52:42 2004 UTC (15 years, 11 months ago) by gage
Allow a 256 error from dvipng.  This seems to be necessary on webwork.math.rochester.edu, so I'm commiting
it to the CVS as well to keep the two systems in sync.

--Mike

Revision 1765 - Directory Listing
Modified Fri Jan 30 18:04:37 2004 UTC (15 years, 11 months ago) by jj
Fix bug from last fix, and a second bug caused by $Global::htmlModeDefault
being accidentally called $Global::htmldisplayModeDefault in this file.

Revision 1764 - Directory Listing
Modified Fri Jan 30 15:28:46 2004 UTC (15 years, 11 months ago) by jj
Some sites use only one display mode.  In that case, the "choice of one"
display mode should not be displayed.

Revision 1759 - Directory Listing
Modified Mon Jan 26 16:59:30 2004 UTC (15 years, 11 months ago) by gage
Minor change to the definition of the timer

Revision 1758 - Directory Listing
Modified Mon Jan 26 16:36:29 2004 UTC (15 years, 11 months ago) by jj
If LaTeX formula ends in a backslash after removing training spaces,
then we removed too much space, so we add a space to the end of it so
it ends '\ \)'.

Revision 1710 - Directory Listing
Modified Tue Jan 6 14:04:34 2004 UTC (16 years ago) by apizer
fixed bug in call to Romberg routine.  Romberg now requires parameters
of the form "level => 8".  This was fixed previously I thought. Not sure
how the fix was lost.

Arnie

Revision 1690 - Directory Listing
Modified Sun Dec 28 19:46:57 2003 UTC (16 years ago) by gage
Zeroed the variable storing the responses to questionnaires.  Should
fix the error on questionnaires revealed by the persistance of mod_perl
modules.

Changed warning message in dangerousMacros.pl to more accurately describe
what is wrong when the gif2eps script cannot be executed.  (Based on actual
experience running a course on webwork.math.rochester.edu -- I couldn't remember
what my own warning message implied.)
--Mike

Revision 1688 - Directory Listing
Modified Sat Dec 27 21:34:04 2003 UTC (16 years ago) by gage
Added error messages that should make it easier to tell if
certain directories have not been created. Also checks that
files are actually created and written at each step of the process.
--Mike

Revision 1620 - Directory Listing
Modified Fri Nov 7 14:55:12 2003 UTC (16 years, 2 months ago) by apizer
fixed a bug in line 2469 replacing \npsvnNumber by \n$psvnNumber

Arnie

Revision 1556 - Directory Listing
Modified Wed Oct 1 02:40:09 2003 UTC (16 years, 3 months ago) by sh002i
changed the way the IO modules work: shared subroutines are in IO now,
and IO has a hash %WeBWorK::PG::IO::SHARE which can be added to
Translator's %shared_subroutine_hash directly.

Revision 1555 - Directory Listing
Modified Wed Oct 1 02:31:54 2003 UTC (16 years, 3 months ago) by sh002i
changed documentation to reflect the fact that reh refresh and mtime
flags are no longer used

Revision 1553 - Directory Listing
Modified Tue Sep 30 01:20:55 2003 UTC (16 years, 3 months ago) by sh002i
added files from WW2

Revision 1550 - Directory Listing
Modified Tue Sep 30 01:18:25 2003 UTC (16 years, 3 months ago) by sh002i
check to see if $envir->{texDisposition} is defined before trying to
access it.

Revision 1540 - Directory Listing
Modified Sat Sep 27 16:47:34 2003 UTC (16 years, 3 months ago) by gage
When displaying a raw student answer, nulls are converted to \0 so that they
can be seen.  This is probably redundant since strings with multiple values
separated by nulls are supposed to be converted to references to arrays before
they reach this point.
--Mike

Revision 1535 - Directory Listing
Modified Fri Sep 26 21:16:18 2003 UTC (16 years, 3 months ago) by gage
Added line which prints out the raw student answer when the debug
flag is on.
--Mike

Revision 1534 - Directory Listing
Modified Thu Sep 25 05:42:31 2003 UTC (16 years, 3 months ago) by sh002i
removed unneeded #! line

Revision 1528 - Directory Listing
Modified Thu Sep 25 01:29:21 2003 UTC (16 years, 3 months ago) by sh002i
fixed #! line

Revision 1525 - Directory Listing
Modified Thu Sep 25 00:29:59 2003 UTC (16 years, 3 months ago) by sh002i
removed unneeded #! lines

Revision 1524 - Directory Listing
Modified Thu Sep 25 00:28:15 2003 UTC (16 years, 3 months ago) by sh002i
added image generation modules from WW2

Revision 1506 - Directory Listing
Modified Fri Sep 19 01:30:13 2003 UTC (16 years, 4 months ago) by gage
Fixed check_string filter so that it places a
value in preivew_text_string and in preview_latex_string
in the answer hash.  For example entering DNE did not
show up in answer preview, which bothered some students.

--Mike

Revision 1505 - Directory Listing
Modified Mon Sep 15 05:47:38 2003 UTC (16 years, 4 months ago) by lr003k
It seems as though the way I tried to fix long decimals isn't working the way I wanted it too, so I've commented it out for now.

~Liam

Revision 1494 - Directory Listing
Modified Tue Sep 9 02:06:31 2003 UTC (16 years, 4 months ago) by jj
Put mbox around entries of a matrix in TeX-based modes to protect
math inside of them.

Revision 1490 - Directory Listing
Modified Sun Sep 7 17:40:54 2003 UTC (16 years, 4 months ago) by gage
Corrected a typo in EV4
--Mike

Revision 1483 - Directory Listing
Modified Fri Sep 5 13:19:45 2003 UTC (16 years, 4 months ago) by gage
Added EV4 routine supplied by Zig Fiedorowicz
--Mike

Revision 1463 - Directory Listing
Modified Fri Aug 15 16:51:09 2003 UTC (16 years, 5 months ago) by gage
Changes to mail that make it work properly with ALLOW_MAIL_TO
--Mike

Revision 1462 - Directory Listing
Modified Fri Aug 15 16:49:42 2003 UTC (16 years, 5 months ago) by gage
Made changes to rh_sticky_answers so that they
are addressed correctly.

Long term I would like to remove all
references to main:: except for those
in the init routines.  The references
can be replaced by a locally defined
pointer to the  value in the current safe
compartment.

This procedure should make it easier to
maintain the macros.  All references to
global variables will occur in the init
routine.

--Mike

Revision 1456 - Directory Listing
Modified Thu Aug 14 16:10:01 2003 UTC (16 years, 5 months ago) by gage
At least a temporary fix for mail_answers_to2

These evaluators are run in the grader and the
environment variables have disappeared??  I can't find
them at any rate.

this is at best a temporary fix until we get the global
variable situation under control when using cached code.
--Mike

Revision 1455 - Directory Listing
Modified Thu Aug 14 13:27:54 2003 UTC (16 years, 5 months ago) by gage
Made changes to anstext and a few
other answer evaluators so that they
evaluated "main::" correctly.

Still need to fix install problem
grader
--Mike

Revision 1454 - Directory Listing
Modified Tue Aug 12 16:43:36 2003 UTC (16 years, 5 months ago) by jj
Redoing fix to random so that random(2,7,3) won't produce 8.  The original
fix was lost in the merger with mod-perl version.

Revision 1453 - Directory Listing
Modified Wed Aug 6 18:59:26 2003 UTC (16 years, 5 months ago) by jj
New file with linear programming simplex method related macros.

Revision 1452 - Directory Listing
Modified Tue Aug 5 16:37:10 2003 UTC (16 years, 5 months ago) by jj
Revised documentation for test_points.

Revision 1451 - Directory Listing
Modified Tue Aug 5 16:34:38 2003 UTC (16 years, 5 months ago) by jj
Added some documentation for test_points.

Revision 1450 - Directory Listing
Modified Tue Aug 5 16:24:48 2003 UTC (16 years, 5 months ago) by jj
Added option of test_points to fun_cmp.

Revision 1390 - Directory Listing
Modified Tue Jul 15 17:55:32 2003 UTC (16 years, 6 months ago) by apizer
Back off from Cervone's new definition of BR

Arnie

Revision 1385 - Directory Listing
Modified Mon Jul 14 20:22:19 2003 UTC (16 years, 6 months ago) by apizer
Fixed a bug in Davide Cervone's changes

Arnie

Revision 1379 - Directory Listing
Modified Mon Jul 14 15:16:30 2003 UTC (16 years, 6 months ago) by apizer
Incorporated Davide Cervone's improvements and bug fixes.  This mostly
involved removing unwanted spaces, etc.

Arnie

Revision 1365 - Directory Listing
Modified Fri Jul 11 20:18:57 2003 UTC (16 years, 6 months ago) by lr003k
In order to make ans_array entries "sticky" I've had to change some stuff.
The answer labels for these entries are now put into $main::PG_FLAGS{ANSWER_ENTRY_ORDER} as an array reference in PG.pl.
In processProblem8.pl the labels are caught again in the subroutines logCourseData and encode_submitted_answers. It is important that
they're caught there rather than earlier because then the translator would think that every entry was it's own answer.
Professor Gage says that processProblem8.pl is no longer used in webwork2, and he says he'll fix this there.

Revision 1351 - Directory Listing
Modified Fri Jul 11 16:30:04 2003 UTC (16 years, 6 months ago) by apizer
incorporate some of davide Cervone'e changes

Arnie

Revision 1333 - Directory Listing
Modified Wed Jul 9 23:20:23 2003 UTC (16 years, 6 months ago) by jj
Fixed new bug introduced by, er, my previous bug fix.

Revision 1332 - Directory Listing
Modified Wed Jul 9 20:29:04 2003 UTC (16 years, 6 months ago) by lr003k
Fixed a rounding problem.

Revision 1331 - Directory Listing
Modified Wed Jul 9 20:28:40 2003 UTC (16 years, 6 months ago) by lr003k
Removed the last change, it's now handled in display_matrix.

Revision 1328 - Directory Listing
Modified Wed Jul 9 19:45:40 2003 UTC (16 years, 6 months ago) by gage
Added $ to PG_random_generator in the subroutine SRAND.  Why it worked
before as a bare word is anyone's guess. Now that $PG_random_generator
is a local variable the bareword no longer works properly.
--Mike

Revision 1327 - Directory Listing
Modified Wed Jul 9 18:06:52 2003 UTC (16 years, 6 months ago) by lr003k
Added a pretty_matrix sub routine to fix some rounding problems.

Revision 1319 - Directory Listing
Modified Mon Jul 7 02:27:15 2003 UTC (16 years, 6 months ago) by jj
Made box option functional for display_matrix.  It lets you specify an
element to be boxed.

Revision 1318 - Directory Listing
Modified Mon Jul 7 01:34:38 2003 UTC (16 years, 6 months ago) by jj
Fixed bugs in matrix display when top_labels are present.

Revision 1317 - Directory Listing
Modified Fri Jul 4 05:08:37 2003 UTC (16 years, 6 months ago) by jj
Fixed tick marks for graphs - x/y values were reversed.

Revision 1314 - Directory Listing
Modified Wed Jul 2 15:27:59 2003 UTC (16 years, 6 months ago) by apizer
Add backslash to list of characters filtered out of sticky answers

Arnie

Revision 1312 - Directory Listing
Modified Tue Jul 1 17:55:12 2003 UTC (16 years, 6 months ago) by gage
Fixed error in sourceAlias.  The variable is %main::envir not
$main::envir !!!
--Mike

Revision 1311 - Directory Listing
Modified Tue Jul 1 15:36:43 2003 UTC (16 years, 6 months ago) by gage
Changed the defintion of *i to be inside the Complex package.
this and the change to dangerousMacros seems to have cured bug #116

In dangerousMacros, I've added sub i {Complex::i}; after sub i;

--Mike

Revision 1310 - Directory Listing
Modified Tue Jul 1 15:35:51 2003 UTC (16 years, 6 months ago) by gage
Changed the defintion of *i to be inside the Complex package.
this and the change to dangerousMacros seems to have cured bug #116
--Mike

Revision 1305 - Directory Listing
Modified Tue Jul 1 00:48:01 2003 UTC (16 years, 6 months ago) by gage
Latest attempt to get a version of dangerousMacros.pl that will
work with both 5.6.1 adn 5.6.0
--Mike

Revision 1304 - Directory Listing
Modified Mon Jun 30 23:24:29 2003 UTC (16 years, 6 months ago) by gage
removed unnecessary "no strict, use strict" pair
--Mike

Revision 1303 - Directory Listing
Modified Mon Jun 30 20:36:57 2003 UTC (16 years, 6 months ago) by apizer
added missing hyperbolic, inverse trig, and inverse hyperbolic functions
cintributed by Davide Cervone

Arnie

Revision 1298 - Directory Listing
Modified Fri Jun 27 19:53:50 2003 UTC (16 years, 6 months ago) by gage
Fixed typo in beginproblem
--Mike

Revision 1294 - Directory Listing
Modified Fri Jun 27 13:57:09 2003 UTC (16 years, 6 months ago) by lr003k
Added a vec_solution_cmp. Used for problems where the answer
needs to be v1_s*v2+t*v3 where v1,v2,and v3 are vectors. v1 has
to be a linear combination of the professors answer where the
first one has a nonzero coefficient. The others are a basis, and
are compared with compare_basis.

Revision 1290 - Directory Listing
Modified Thu Jun 26 22:43:15 2003 UTC (16 years, 6 months ago) by gage
Merge the time optimized branch and the main branch.  I forgot one subroutine
--Mike

Revision 1286 - Directory Listing
Modified Thu Jun 26 21:08:47 2003 UTC (16 years, 6 months ago) by gage
Make sure that the local my variables are updated in PGbasicmacros
as well as the variables in main::.

--Mike

Revision 1285 - Directory Listing
Modified Thu Jun 26 21:04:09 2003 UTC (16 years, 6 months ago) by gage
Adding preliminary ability to decompose non-square matrices.  Won't work
if a permutation is required (i.e. a pivot)
--Mike

Revision 1280 - Directory Listing
Modified Thu Jun 26 17:42:18 2003 UTC (16 years, 6 months ago) by malsyned
Merged the changes needed to work with the new WW2 translator
optimizations into the main pg branch.

Revision 1278 - Directory Listing
Modified Thu Jun 26 13:55:43 2003 UTC (16 years, 6 months ago) by lr003k
Matrices now displayed in previewer.

Revision 1276 - Directory Listing
Modified Wed Jun 25 16:26:42 2003 UTC (16 years, 6 months ago) by lr003k
committed the wrong thing

Revision 1274 - Directory Listing
Modified Wed Jun 25 15:43:03 2003 UTC (16 years, 6 months ago) by lr003k
fixed a bug

Revision 1267 - Directory Listing
Modified Tue Jun 24 15:25:58 2003 UTC (16 years, 6 months ago) by gage
Changes that allow these files to work with caching version
of Webwork2.0 -- optimized for speed
--Mike

Revision 1266 - Directory Listing
Modified Tue Jun 24 15:24:09 2003 UTC (16 years, 6 months ago) by gage
Changes that allow these files to work with optimized
version of WeBWorK2.0 which uses caching of macro files.
--Mike

Revision 1265 - Directory Listing
Modified Tue Jun 24 14:58:03 2003 UTC (16 years, 6 months ago) by lr003k
Made the code more object-oriented

Revision 1253 - Directory Listing
Modified Mon Jun 23 18:34:44 2003 UTC (16 years, 6 months ago) by gage
More changes to make these files compatible
with WeBWorK2.0 and cached compartments
-- Mike

Revision 1251 - Directory Listing
Modified Mon Jun 23 16:24:32 2003 UTC (16 years, 6 months ago) by gage
Changes made to PGbasicmacros so that it can be cached.
Changes should be compatible with webwork1.8
--MIke

Revision 1250 - Directory Listing
Modified Mon Jun 23 15:43:11 2003 UTC (16 years, 6 months ago) by gage
Made changes required to allow caching of these files.
My tests indicate that these changes are compatible with webwork1.8
One possible problem might be the mail-to answer macros
which access the environement variable directly
I think I have this properly patched, but it has not been
tested yet.
--Mike

Revision 1238 - Directory Listing
Modified Fri Jun 20 19:05:38 2003 UTC (16 years, 7 months ago) by lr003k
Matrices now take math constants.

Revision 1237 - Directory Listing
Modified Fri Jun 20 18:59:44 2003 UTC (16 years, 7 months ago) by lr003k
Student answer now displayed in a html table given by jones's
display matrix method in PGmatrixmacros. The braces were giving
me headaches so I set the option to none, at least for now.

Revision 1161 - Directory Listing
Modified Fri Jun 13 17:36:10 2003 UTC (16 years, 7 months ago) by lr003k
Was not accepting negative answers, the sign problem is fixed now.

Revision 1158 - Directory Listing
Modified Fri Jun 13 17:12:18 2003 UTC (16 years, 7 months ago) by sh002i
rollback change to the way ImageGenerator::add is called.
-sam

Revision 1155 - Directory Listing
Modified Fri Jun 13 02:33:56 2003 UTC (16 years, 7 months ago) by sh002i
changes to the math_ev3 functions in PGbasicmacros.pl to support new
interface to ImageGenerator and some cleanup.
-sam

Revision 1140 - Directory Listing
Modified Thu Jun 12 19:14:38 2003 UTC (16 years, 7 months ago) by gage
Answer labels are now prefixed by a Quiz prefix which allows more
than one problem to appear on the same page.
-- Mike

Revision 1127 - Directory Listing
Modified Wed Jun 11 19:18:19 2003 UTC (16 years, 7 months ago) by lr003k
Was working from an older copy before my last update, sorry.

Revision 1126 - Directory Listing
Modified Wed Jun 11 18:34:40 2003 UTC (16 years, 7 months ago) by jj
Fixed isPrime, which had said that 4 was prime, and shortened its loop.

Revision 1123 - Directory Listing
Modified Wed Jun 11 15:28:47 2003 UTC (16 years, 7 months ago) by lr003k
Ok, there is the ans_array_filter added which allows for the answer to be coming from the ans_array.

Revision 1122 - Directory Listing
Modified Wed Jun 11 14:54:27 2003 UTC (16 years, 7 months ago) by lr003k
Added two methods for naming the blanks in ans_array. The names now have the format ArRaY3[1,0,2] (this would be the name of
the 3rd answer (it's taken from main::answer_count which is then incremented so the answer before it is AnSwEr2 and the
answer after it is AnSwEr4) and it would be the second matrix or vector in the answer ( I need to take multiple vectors for
things like basis cmp, so ans_array_extension puts the vectors in different locations) and the 0 and 2 are row and column in
that matrix or vector.

Revision 1121 - Directory Listing
Modified Wed Jun 11 14:47:59 2003 UTC (16 years, 7 months ago) by lr003k
I removed the subroutine answer_matrix since it really belongs in basic macros with the other answer blank methods.

Revision 1120 - Directory Listing
Modified Wed Jun 11 14:46:35 2003 UTC (16 years, 7 months ago) by lr003k
I've added ans_array and ans_array extension and moved answer_matrix here since this is probably where it should be with all
the other answer blank methods. I still have to comment the code.

Revision 1117 - Directory Listing
Modified Wed Jun 11 04:00:37 2003 UTC (16 years, 7 months ago) by gage
Added a feature to correspond to a change made in process_answers in Translator.pm.

 Each answer
evaluator is given the
answer AND the answer label (e.g. AnSWer1) of the answer.  The label
is placed in the answer hash at $hash{ans_label} for use by filters
that need to know the label of the answer they are evaluating.

--Mike

Revision 1115 - Directory Listing
Modified Wed Jun 11 02:43:42 2003 UTC (16 years, 7 months ago) by apizer
Fixed error concerning variable $string.
Cleaned up how polynomials are displayed.

Arnie

Revision 1102 - Directory Listing
Modified Tue Jun 10 16:23:47 2003 UTC (16 years, 7 months ago) by lr003k
ok, I'm pretty sure that this one is the one we want. Unfortunately the other one was an old one, that cmpl_cmp4 was not used
anywhere and I had removed it later, and this one has multi_cmp. Sorry for all the confusion.

Revision 1097 - Directory Listing
Modified Mon Jun 9 23:26:19 2003 UTC (16 years, 7 months ago) by jj
Slightly better handling of top_labels in tth mode when force_tex is set; namely
it ignores the labels instead of letting the TeX code confuse tth so badly that
the matrix is basically lost.

Revision 1094 - Directory Listing
Modified Mon Jun 9 22:46:25 2003 UTC (16 years, 7 months ago) by jj
Fixed bug when the function is sampled at a point where it is not defined.

Revision 1091 - Directory Listing
Modified Mon Jun 9 21:53:11 2003 UTC (16 years, 7 months ago) by gage
Added > /dev/null tags to the commands which run tex and dvi for
HTML_img mode.  These will probably work now for the most part.
I don't know how well this will work if there is an error in
getting either tex or dvips to run.

For many problems using WeBWorK1.8 and typeset3 mode  thing work fine.
Please submit example problems where the images don't show up or some
other image related error occurs as bugs to
http://webwork3.math.rochester.edu/bugzilla
--Mike

Revision 1090 - Directory Listing
Modified Mon Jun 9 21:24:08 2003 UTC (16 years, 7 months ago) by gage
Fixed a patch to round (and Round) originally due to Mark Schmitt
which didn't get included in the latest updates and transfer to pg
--Mike

Revision 1088 - Directory Listing
Modified Mon Jun 9 21:05:11 2003 UTC (16 years, 7 months ago) by gage
Commented out code  that is not used (I believe)

comp_cplx4 and cplx_cmp4

-- Mike

Revision 1080 - Directory Listing
Modified Mon Jun 9 17:49:36 2003 UTC (16 years, 7 months ago) by apizer
remove unneccsary shebang lines

Arnie

Revision 1079 - Directory Listing
Modified Mon Jun 9 17:36:12 2003 UTC (16 years, 7 months ago) by apizer
removed unneccesary shebang lines

Revision 1073 - Directory Listing
Modified Mon Jun 9 13:30:46 2003 UTC (16 years, 7 months ago) by gage
This module contains IO used in saving an answer to a file.
--Mike

Revision 1072 - Directory Listing
Modified Mon Jun 9 02:27:04 2003 UTC (16 years, 7 months ago) by gage
The file PGcomplexmacros.pl is partially in sync with the version in
courseScripts.  I need advice on the latest versions of some of the
subroutines from Liam.
--Mike

Revision 1071 - Directory Listing
Modified Mon Jun 9 02:26:17 2003 UTC (16 years, 7 months ago) by gage
Bringing these files in sync with the latest versions in the
courseScripts CVS
--Mike

Revision 1070 - Directory Listing
Modified Mon Jun 9 02:02:20 2003 UTC (16 years, 7 months ago) by gage
Bringing this version of Matrix.pm up to date with the latest in
courseScripts.
--Mike

Revision 1069 - Directory Listing
Modified Mon Jun 9 02:01:41 2003 UTC (16 years, 7 months ago) by gage
Bringing this version into sync with the latest version in
courseScripts.
In particular dvipng is active in this script to make HTML_img
useable in WeBWorK2.0.  Not yet finished with this.
--Mike

Revision 1068 - Directory Listing
Modified Mon Jun 9 01:59:37 2003 UTC (16 years, 7 months ago) by gage
Updating the copy of PGchoicemacros.pl to the latest version available
in courseScripts
--Mike

Revision 1066 - Directory Listing
Modified Mon Jun 9 00:54:33 2003 UTC (16 years, 7 months ago) by gage
Adding a newer version of PGmatrixmacros.pl
--Mike

Revision 1064 - Directory Listing
Modified Mon Jun 9 00:34:51 2003 UTC (16 years, 7 months ago) by gage
Adding recent macro files to the pg collection
--Mike

Revision 1050 - Directory Listing
Added Fri Jun 6 21:39:42 2003 UTC (16 years, 7 months ago) by sh002i
moved PG modules and macro files from webwork-modperl to pg
-sam

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