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I am writing a procedure in Maple for doing some optimization. Really now I want to ask Maple whether the Matrix is 2x2 or 3x3 or 4x4 and so on. And in each case of these matrices I am going to do something. Also, to know if the matrix is not sequare, i am going to do something else. I know that the command Dimension(A) gives you the dimension of the matrix, but I am not sure if it is the needed command to be used, and if it is so, how to use it?

Can any one help me in this issue?

Thank you.

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    $\begingroup$ The Maple documentation is going to be infinitely more valuable for questions like this. It even includes examples. See here. $\endgroup$ – AnonSubmitter85 Jul 11 '13 at 2:12
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Questions about programming in Maple whose main focus is not on the mathematics of the algorithms are better suited for stackoverflow.com or mapleprimes.com

f := proc(M::Matrix)
        local m,n;
        (m,n) := LinearAlgebra:-Dimension(M);
        if m <> n then
           "the nonsquare case";
        elif m = 2 then
           "the 2-by-2 case";
        elif m = 3 then
           "the 3-by-3 case";
        else
           "some other case";
        end if;
     end proc:

f( Matrix(3,4) );

                        "the nonsquare case"

f( Matrix(2,2) );

                          "the 2-by-2 case"

f( Matrix(3,3) );

                          "the 3-by-3 case"

f( Matrix(4,4) );

                          "some other case"
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  • $\begingroup$ So, this is the ideal one! $\endgroup$ – Mhenni Benghorbal Jul 11 '13 at 10:56

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