Difference between revisions of "PointsInAnswers"

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<b>Answer Evaluation:</b>
  
<b>Answer Evaluation:</b>
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As is the answer.
  
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We can control the hints students receive using <code>cmp(showDimensionHints=>1, showCoordinateHints=>1)</code>.
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For all options, see "Flags for Point()->cmp" on [http://webwork.maa.org/doc/cvs/pg_CURRENT/doc/MathObjects/MathObjectsAnswerCheckers.html MathObjectsAnswerCheckers.html]
 
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[[IndexOfProblemTechniques|Problem Techniques Index]]
  
[[IndexOfProblemTechniques|Problem Techniques Index]]
 
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[[Category:Problem Techniques]]
  
[[Category:Problem Techniques]]
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<li>PG macro: [http://cvs.webwork.rochester.edu/viewcvs.cgi/pg/macros/contextLimitedPoint.pl contextLimitedPoint.pl]</li>
  
<li>PG macro: [http://cvs.webwork.rochester.edu/viewcvs.cgi/pg/macros/contextLimitedPoint.pl contextLimitedPoint.pl]</li>
 
<li>[http://webwork.maa.org/wiki/Specialized_contexts Specialized_contexts]</li>
  
<li>[http://webwork.maa.org/wiki/Specialized_contexts Specialized_contexts]</li>
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<ul>
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<li>POD documentation: [http://webwork.maa.org/doc/cvs/pg_CURRENT/doc/MathObjects/MathObjectsAnswerCheckers.html MathObjectsAnswerCheckers.html]</li>
 
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Revision as of 15:43, 6 February 2010

Points in Student Answers


This PG code shows how to check student answers that are points.

Problem Techniques Index

PG problem file Explanation 
DOCUMENT();

loadMacros(
"PGstandard.pl",
"contextLimitedPoint.pl",
"PGcourse.pl",
);

TEXT(beginproblem());

Initialization: We load the contextLimitedPoint.pl macro which automatically loads MathObjects.pl. The LimitedPoint context does not allow operations between points.

Alternatively, instead of loading contextLimitedPoint.pl, we could have loaded MathObjects.pl and parserVectorUtils.pl. This would allow operations, such as addition and subtraction, between points. 

Context("LimitedPoint");

$f = Formula("2-x");

$xint = Point("(2,0)");
$yint = Point("(0,2)");

Setup: Everything is as usual.

If we had loaded parserVectorUtils.pl instead, we would use Context("Vector2D"); for two-dimensional space or Context("Vector"); for three-dimensional space. 

Context()->texStrings;
BEGIN_TEXT
If \( y = f(x) = $f \), find the x- and y-intercepts.  
Enter your answers as points \( (a,b) \) that include parentheses.
$BR
x-intercept: \{ ans_rule(15) \}
$BR
y-intercept: \{ ans_rule(15) \}
END_TEXT
Context()->normalStrings;

Main Text: The main text section of the file is as we'd expect. 

ANS( $xint->cmp() );
ANS( $yint->cmp() );

ENDDOCUMENT();

Answer Evaluation: We can control the hints students receive using cmp(showDimensionHints=>1, showCoordinateHints=>1). For all options, see "Flags for Point()->cmp" on MathObjectsAnswerCheckers.html

Problem Techniques Index



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