I'm starting to think this is a bug in ImplicitEquation context instead of due to another reason...
I've noticed strange errors when the ranges of x and y below are changed to
[-1,1]. In that case I get this error...
Error parsing answer: 'plicitEquation' is not defined in this context; see position 3 of formula
Is this a bug in ImplicitEquation context usage after all?
cs
DOCUMENT();
loadMacros(
"MathObjects.pl",
"PGstandard.pl",
"PGML.pl",
"PGcourse.pl",
"parserNumberWithUnits.pl",
"contextArbitraryString.pl",
"parserMultiAnswer.pl",
"parserPopUp.pl",
"contextInequalities.pl",
"parserImplicitEquation.pl",
"PGgraphmacros.pl",
);
TEXT(beginproblem());
$showPartialCorrectAnswers = 1;
######################################################################
Context("ImplicitEquation");
Context()->variables->set(
x=>{limits=>[-8,8]},
y=>{limits=>[-8,8]}
);
BEGIN_PGML
What is the equation for a circle with its center at (4, 2)
throught the point (3, 2)?
[________________________]{ImplicitEquation("(x-4)^2 + (y-2)^2=1",
tolerance=>0.0001)}
END_PGML
######################################################################
ENDDOCUMENT();