Difference between revisions of "FormattingCorrectAnswers: Equations"

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(New page: There are a number of ways to effect the way the correct answer is displayed to the student. The interaction between eval() , substitute() , reduceConstants , reduceConstantFunctions ....)
 
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There are a number of ways to effect the way the correct answer is displayed to the student. The interaction between eval() , substitute() , reduceConstants , reduceConstantFunctions .
  
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<h2>Formatting Correct Answers: Equations: PG Code Snippet</h2>
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Note:[[PGLabs]] is an efficient way to check code.
  
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<!-- Header for these sections -- no modification needed -->
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<p style="background-color:#eeeeee;border:black solid 1px;padding:3px;">
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<em>This code snippet shows the essential PG code to check student answers that are equations. Note that these are <b>insertions</b>, not a complete PG file. This code will have to be incorporated into the problem file on which you are working.</em>
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</p>
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<p style="text-align:center;">
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[[IndexOfProblemTechniques|Problem Techniques Index]]
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</p>
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<table cellspacing="0" cellpadding="2" border="0">
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<tr valign="top">
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<th> PG problem file </th>
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<th> Explanation </th>
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</tr>
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<!-- Load specialized macro files section -->
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<tr valign="top">
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<td style="background-color:#ddffdd;border:black 1px dashed;">
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<pre>
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loadMacros("parserImplicitPlane.pl");
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</pre>
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</td>
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<td style="background-color:#ccffcc;padding:7px;">
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<p>
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We don't have to change the tagging and documentation section of the problem file.
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In the initialization section, we need to include the macros file <code>parserImplicitPlane.pl</code>.
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</p>
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</td>
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</tr>
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<!-- Setup section -->
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<tr valign="top">
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<td style="background-color:#ffffdd;border:black 1px dashed;">
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<pre>
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$dfx = 3;
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$yintercept = 4;
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Context("ImplicitPlane");
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Context()->variables->remove("z");
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$h = ImplicitPlane("y = $dfx x + $yintercept");
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</pre>
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</td>
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<td style="background-color:#ffffcc;padding:7px;">
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<p>
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In the problem set-up section of the file, we specify that the Context should be <code>......</code>, and define the answer to be a formula.
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</p>
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<p>
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Notes: on using this and related Contexts.
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</p>
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</td>
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</tr>
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<!-- Question text section -->
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<tr valign="top">
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<td style="background-color:#ffdddd;border:black 1px dashed;">
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<pre>
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BEGIN_TEXT
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...... question text ......
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END_TEXT
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</pre>
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<td style="background-color:#ffcccc;padding:7px;">
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<p>
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The problem text section of the file is as we'd expect.
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</p>
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</td>
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</tr>
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<!-- Answer section -->
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<tr valign="top">
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<td style="background-color:#eeddff;border:black 1px dashed;">
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<pre>
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ANS( $expr->cmp() );
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</pre>
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<td style="background-color:#eeccff;padding:7px;">
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<p>
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As is the answer.
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</p>
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</td>
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</tr>
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</table>
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<p style="text-align:center;">
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[[IndexOfProblemTechniques|Problem Techniques Index]]
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</p>
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[[Category:Problem Techniques]]

Revision as of 16:19, 14 May 2010

Formatting Correct Answers: Equations: PG Code Snippet


This code snippet shows the essential PG code to check student answers that are equations. Note that these are insertions, not a complete PG file. This code will have to be incorporated into the problem file on which you are working.

Problem Techniques Index

PG problem file Explanation 
  loadMacros("parserImplicitPlane.pl");

We don't have to change the tagging and documentation section of the problem file. In the initialization section, we need to include the macros file parserImplicitPlane.pl. 


  $dfx = 3;
  $yintercept = 4;
  Context("ImplicitPlane");
  Context()->variables->remove("z");
  $h = ImplicitPlane("y = $dfx x + $yintercept");

In the problem set-up section of the file, we specify that the Context should be ......, and define the answer to be a formula.

Notes: on using this and related Contexts. 

  BEGIN_TEXT
  ...... question text ......
  END_TEXT

The problem text section of the file is as we'd expect. 

  ANS( $expr->cmp() );

As is the answer.

Problem Techniques Index

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