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Dynamically setting size in matrix questions

Posted on 2008-02-04 09:32 By Colin Gillespie (Maple Rating 1 11)
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Dear All,

I'm creating matrix questions and wish to dynamically set the size of the matrix. So I'm trying something like this:

\qutext{Find the transpose of the matrix $$A=\left[\begin{array}{ccc} 1 & 2 & 3\\ 0 & 1 & -2\end{array}\right]$$}

\code{$a=3;}

\size{$a}{2}
 

<snip>

But this doesn't seem to work.

 Thanks

 Colin

 

 

‹ Creating a matrix by setting eigenvalues Equation Editor with Mac OS X ›

Something for the question editor.

Comment on 2008-02-04 10:44 from jaytreiman (Maple Rating 1 40)

I generated a question using the MathTA 3.01 question editor
that generates different sizes of matrices. Here is the code
it generated for finding the determinant of an nxn matrix. I
hope this contains what you want.

question=Find the determinant of $mathmlM .@
maple=evalb(simplify(($ANSWER)-($RESPONSE))=0);@
maple_answer=$ans;@
type=formula@
mode=Maple@
name=Matrix size@
editing=useHTML@
algorithm=$a=range(3,5,1);
$M=maple("LinearAlgebra:-RandomMatrix($a,$a);
");
$mathmlM=maple("printf(MathML:-ExportPresentation($M));
");
$ans=maple("LinearAlgebra:-Determinant($M)");@

Thanks, but..

Comment on 2008-02-06 09:21 from Colin Gillespie (Maple Rating 1 11)

Hi,

Thanks for the suggestion, but my problem is trying to dynamically set the size of the answer, as opposed to the initial matrix. In your example, the answer is always a text box.

Thanks

Colin

Setting size

Comment on 2008-02-06 17:03 from jaytreiman (Maple Rating 1 40)

What format do you want for the answer?

 

If you are willing to use Maple formating for the input, you can require the answer to be entered in the form "[[a,b,c],[d,e,f]]."  (This is almost identical to TI-89 format.)

You then need to set up the grading appropriately by converting to a Matrix, converting to another format, or checking entry byentry.

Thanks for your response

Comment on 2008-02-07 08:28 from Colin Gillespie (Maple Rating 1 11)

Thanks for your response Jay. Funnily enough, I'd just come up with the same solution as you had suggested.

Many thanks,

Colin

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