Difference between revisions of "PointsInAnswers"

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<b>Setup:</b>
 
<b>Setup:</b>
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Everything is as usual.
  
  +
Everything is as usual. The <code>LimitedPoint</code> context does not allow operations among points (such as adding, etc.). We could have used <code>Context("Point");</code> instead.
 
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<p>
  
<p>
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If we had loaded <code>parserVectorUtils.pl</code> instead, we would use <code>Context("Vector2D");</code> for two-dimensional space or <code>Context("Vector");</code> for three-dimensional space.
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Alternatively, if we had loaded <code>parserVectorUtils.pl</code>, we would use <code>Context("Vector2D");</code> for two-dimensional space or <code>Context("Vector");</code> for three-dimensional space.
 
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<p>
  
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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/pod/pg/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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<ul>
  
<ul>
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<li>POD documentation: [http://webwork.maa.org/doc/cvs/pg_CURRENT/macros/contextLimitedPoint.pl.html contextLimitedPoint.pl]</li>
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<li>POD documentation: [http://webwork.maa.org/pod/pg/macros/contextLimitedPoint.pl.html contextLimitedPoint.pl.html]</li>
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<li>PG macro: [http://cvs.webwork.rochester.edu/viewcvs.cgi/pg/macros/contextLimitedPoint.pl contextLimitedPoint.pl]</li>
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<li>PG macro: [http://webwork.maa.org/viewvc/system/trunk/pg/macros/contextLimitedPoint.pl?view=log 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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<ul>
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<li>POD documentation: [http://webwork.maa.org/pod/pg/doc/MathObjects/MathObjectsAnswerCheckers.html MathObjectsAnswerCheckers.html]</li>
 
</ul>
  
</ul>

Revision as of 17:29, 7 April 2021

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. The LimitedPoint context does not allow operations among points (such as adding, etc.). We could have used Context("Point"); instead.

Alternatively, if we had loaded parserVectorUtils.pl, 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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