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Revision 4997 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Mon Jun 11 18:16:40 2007 UTC (12 years, 8 months ago) by gage
File length: 36286 byte(s)
Diff to previous 4969
Fixing docementation so that it can be read from the web.

Revision 4969 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Thu May 24 17:55:37 2007 UTC (12 years, 9 months ago) by gage
File length: 36287 byte(s)
Diff to previous 3314
Pod documentation upgrades

Revision 3314 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Jun 24 20:11:23 2005 UTC (14 years, 8 months ago) by gage
File length: 36270 byte(s)
Diff to previous 1896
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 1896 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Wed Mar 17 00:45:28 2004 UTC (15 years, 11 months ago) by gage
File length: 28971 byte(s)
Diff to previous 1534
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 1534 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Thu Sep 25 05:42:31 2003 UTC (16 years, 5 months ago) by sh002i
File length: 28082 byte(s)
Diff to previous 1528
removed unneeded #! line

Revision 1528 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Thu Sep 25 01:29:21 2003 UTC (16 years, 5 months ago) by sh002i
File length: 28112 byte(s)
Diff to previous 1331
fixed #! line

Revision 1331 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Wed Jul 9 20:28:40 2003 UTC (16 years, 7 months ago) by lr003k
File length: 28112 byte(s)
Diff to previous 1327
Removed the last change, it's now handled in display_matrix.

Revision 1327 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Wed Jul 9 18:06:52 2003 UTC (16 years, 7 months ago) by lr003k
File length: 28602 byte(s)
Diff to previous 1294
Added a pretty_matrix sub routine to fix some rounding problems.

Revision 1294 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Jun 27 13:57:09 2003 UTC (16 years, 7 months ago) by lr003k
File length: 25648 byte(s)
Diff to previous 1278
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 1278 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Thu Jun 26 13:55:43 2003 UTC (16 years, 8 months ago) by lr003k
File length: 20366 byte(s)
Diff to previous 1276
Matrices now displayed in previewer.

Revision 1276 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Wed Jun 25 16:26:42 2003 UTC (16 years, 8 months ago) by lr003k
File length: 21041 byte(s)
Diff to previous 1274
committed the wrong thing

Revision 1274 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Wed Jun 25 15:43:03 2003 UTC (16 years, 8 months ago) by lr003k
File length: 21033 byte(s)
Diff to previous 1265
fixed a bug

Revision 1265 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Tue Jun 24 14:58:03 2003 UTC (16 years, 8 months ago) by lr003k
File length: 20528 byte(s)
Diff to previous 1238
Made the code more object-oriented

Revision 1238 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Jun 20 19:05:38 2003 UTC (16 years, 8 months ago) by lr003k
File length: 20050 byte(s)
Diff to previous 1237
Matrices now take math constants.

Revision 1237 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Jun 20 18:59:44 2003 UTC (16 years, 8 months ago) by lr003k
File length: 20018 byte(s)
Diff to previous 1161
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 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Jun 13 17:36:10 2003 UTC (16 years, 8 months ago) by lr003k
File length: 19601 byte(s)
Diff to previous 1123
Was not accepting negative answers, the sign problem is fixed now.

Revision 1123 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Wed Jun 11 15:28:47 2003 UTC (16 years, 8 months ago) by lr003k
File length: 19644 byte(s)
Diff to previous 1080
Ok, there is the ans_array_filter added which allows for the answer to be coming from the ans_array.

Revision 1080 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Mon Jun 9 17:49:36 2003 UTC (16 years, 8 months ago) by apizer
File length: 15993 byte(s)
Diff to previous 1071
remove unneccsary shebang lines

Arnie

Revision 1071 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Mon Jun 9 02:26:17 2003 UTC (16 years, 8 months ago) by gage
File length: 16022 byte(s)
Diff to previous 1064
Bringing these files in sync with the latest versions in the
courseScripts CVS
--Mike

Revision 1064 - (view) (download) (as text) (annotate) - [select for diffs]
Added Mon Jun 9 00:34:51 2003 UTC (16 years, 8 months ago) by gage
File length: 2228 byte(s)
Adding recent macro files to the pg collection
--Mike

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