MatrixAnswer1

Answer is a Matrix

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This PG code shows how to evaluate answers that are matrices.

• File location in OPL: FortLewis/Authoring/Templates/LinAlg/MatrixAnswer1.pg

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PG problem file	Explanation
Problem tagging data	Problem tagging:
DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "AnswerFormatHelp.pl", ); TEXT(beginproblem());	Initialization:
Context("Matrix"); $A = Matrix([ [random(-5,5,1),random(-5,5,1),random(-5,5,1)], [random(-5,5,1),random(-5,5,1),random(-5,5,1)], ]); $B = Matrix([ [random(-5,5,1),random(-5,5,1),random(-5,5,1)], [random(-5,5,1),random(-5,5,1),random(-5,5,1)], ]); $answer = $A * ($B->transpose);	Setup:
Context()->texStrings; BEGIN_TEXT Suppose \[ A = $A \ \ \mbox{and} \ \ B = $B. \] Evaluate the following matrix product. $BR $BR \( A B^T = \) \{ $answer->ans_array(5) \} \{ AnswerFormatHelp("matrices") \} END_TEXT Context()->normalStrings;	Main Text: Use the ->ans_array(width) method on the MathObject matrix $answer to produce an array of answer boxes each with a specified character width.
$showPartialCorrectAnswers = 1; ANS( $answer->cmp() );	Answer Evaluation: Use standard MathObject answer evaluation.
Context()->texStrings; BEGIN_SOLUTION ${PAR}SOLUTION:${PAR} Solution explanation goes here. END_SOLUTION Context()->normalStrings; COMMENT('MathObject version.'); ENDDOCUMENT();	Solution:

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