Difference between revisions of "User:Malcolm/wip/Sage WW Notes"

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When passing functions to Sage, if the function is defined as a math object problems can occur since it can happen that none of
 
When passing functions to Sage, if the function is defined as a math object problems can occur since it can happen that none of
<pre>
 
  +
<source lang="perl">
 
$f
 
$f
 
$f->string()
 
$f->string()
 
$f->stringify()
 
$f->stringify()
 
$f->TeX()
 
$f->TeX()
</pre>return the orginal string used to define the function.
 
  +
</source>
  +
return the orginal string used to define the function.
   
 
For example with the set up:
 
For example with the set up:
<pre>
 
  +
<source lang="perl">
 
Context("Numeric");
 
Context("Numeric");
 
$f = Compute("(x-(-2))*(x-2)*(x-4)");
 
$f = Compute("(x-(-2))*(x-2)*(x-4)");
</pre>
+
</source>
 
then
 
then
<pre>$f->string()</pre> produces[x-(-2)]*(x-2)*(x-4)
+
*<tt>$f->string()</tt> produces <tt>[x-(-2)]*(x-2)*(x-4)</tt>
$f->TeX() produces\left(x-\left(-2\right)\right)\!\left(x-2\right)\!\left(x-4\right)
+
* <tt>$f->TeX()</tt> produces <tt>\left(x-\left(-2\right)\right)\!\left(x-2\right)\!\left(x-4\right)</tt>
$f->stringify() produces:
+
* <tt>$f->stringify()</tt> produces:
[x-(-2)]*(x-2)*(x-4) in normalStrings
+
** <tt>[x-(-2)]*(x-2)*(x-4)</tt> in <tt>normalStrings</tt>
\left(x-\left(-2\right)\right)\!\left(x-2\right)\!\left(x-4\right) in texStrings
+
** <tt>\left(x-\left(-2\right)\right)\!\left(x-2\right)\!\left(x-4\right)</tt> in <tt>texStrings</tt>
 
Possible solution:
 
Possible solution:
Use a construction like
+
# Use a construction like
<pre>
+
#: <source> $f_raw = "(x-(-2))*(x-2)*(x-4)";</source>
$f_raw = "(x-(-2))*(x-2)*(x-4)";
+
#: <source> $f = Compute($f_raw); </source>
$f = Compute($f_raw);
+
And use <tt>$f_raw</tt> to pass to Sage and <tt>$f</tt> to work with in WW.
</pre>
 

Revision as of 15:09, 12 June 2012

Notes on embedding Sage into WW problems using the Sage cell server - May/June 2012

When passing functions to Sage, if the function is defined as a math object problems can occur since it can happen that none of <source lang="perl"> $f $f->string() $f->stringify() $f->TeX() </source> return the orginal string used to define the function.

For example with the set up: <source lang="perl"> Context("Numeric"); $f = Compute("(x-(-2))*(x-2)*(x-4)"); </source> then

  • $f->string() produces [x-(-2)]*(x-2)*(x-4)
  • $f->TeX() produces \left(x-\left(-2\right)\right)\!\left(x-2\right)\!\left(x-4\right)
  • $f->stringify() produces:
    • [x-(-2)]*(x-2)*(x-4) in normalStrings
    • \left(x-\left(-2\right)\right)\!\left(x-2\right)\!\left(x-4\right) in texStrings

Possible solution:

  1. Use a construction like
    <source> $f_raw = "(x-(-2))*(x-2)*(x-4)";</source>
    <source> $f = Compute($f_raw); </source>

And use $f_raw to pass to Sage and $f to work with in WW.