PGLabs

PG Labs

On-line labs for rendering of PG code. These two labs allow you to experiment with PG syntax.

For example:

Context("Numeric");
$f = Compute("x^2-3x+5");
$fp = $f->D; # calculate the derivative
TEXT($fp->cmp->evaluate("2x-3")->pretty_print );

On the last line TEXT prints the results of (reading from left to right)
- Constructing the AnswerEvaluator for the contents of the Formula $fp
- Evaluating the string "2x-3" using this AnswerEvaluator to produce an AnswerHash
- Recursively representing the contents of the AnswerHash in a nice table

Experiment with the new PG markup language syntax (PGML)] which simplifies the graphical layout

of the mathematics question. This is still under development and can't yet be used in standard PG problems.