Difference between revisions of "WeightedGrader"
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| Line 46: | Line 46: | ||
$r = random(2,4,1); |
$r = random(2,4,1); |
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$answer1 = Real("pi * $r**2"); |
$answer1 = Real("pi * $r**2"); |
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| − | $answer2 = Formula("x |
+ | $answer2 = Formula("($r - 1) * x**2 * t") -> reduce; |
$answer3 = String("A"); |
$answer3 = String("A"); |
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| Line 65: | Line 65: | ||
Enter \( \pi $r^2 \): \{ans_rule(10)\} |
Enter \( \pi $r^2 \): \{ans_rule(10)\} |
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| − | Enter \( |
+ | Enter \( $answer2 \): \{ans_rule(10)\} |
Enter A: \{ans_rule(10)\} |
Enter A: \{ans_rule(10)\} |
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Revision as of 01:50, 2 November 2009
Weighted Graders
This code shows how to assign different weights (percentages) to each answer in a problem.
| PG problem file | Explanation |
|---|---|
DOCUMENT(); loadMacros( "PGstandard.pl", "PGcourse.pl", "MathObjects.pl", "weightedGrader.pl", ); install_weighted_grader(); TEXT(beginproblem); |
Initialization: We need to include the |
Context("Numeric");
Context()->variables->add(t=>"Real");
Context()->strings->add(A=>{},B=>{});
$r = random(2,4,1);
$answer1 = Real("pi * $r**2");
$answer2 = Formula("($r - 1) * x**2 * t") -> reduce;
$answer3 = String("A");
|
Set-up: To show how this works with MathObjects, we add some variables and strings to the context. |
Context()->texStrings;
BEGIN_TEXT
Enter \( \pi $r^2 \): \{ans_rule(10)\}
Enter \( $answer2 \): \{ans_rule(10)\}
Enter A: \{ans_rule(10)\}
END_TEXT
Context()->normalStrings;
|
Main Text: Answer boxes are as usual. |
$showPartialCorrectAnswers = 0; WEIGHTED_ANS( ($answer1)->cmp(), 40 ); WEIGHTED_ANS( ($answer2)->cmp(), 40 ); WEIGHTED_ANS( ($answer2)->cmp(), 20 ); ENDDOCUMENT(); |
Answer Evaluation: Use |
