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PG Labs

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

Test your PG code fragments

Click on this link to go to PG calculator:

For example you could enter the code fragment below into the calculator:

$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

Experimental PGML markup lab

  • 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.

Homework sets using PGML