How do I multiply matrices having elements as vectors?

Sameer

2015 6 2

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A*B doesn't work A.*B doesn't work either since it multiplies them element by element

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Sameer 2015-6-2

编辑：Sameer 2015-6-2

在 MATLAB Online 中打开

         a=1:1000;
    A=[a 2*a;a 2*a];
    B=[2*a a;a a];
    C=A*B  %Error using  * 
%Inner matrix dimensions must agree.
 D= A.*B % multiplies element by element which I don't want

Adam 2015-6-2

So what is your expected result?

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Matthew Eicholtz 2015-6-2

0 个投票

If I understand the question correctly, you are asking how to multiply two vectors of the same size.

Without loss of generality, let's assume A and B are 1x10 vectors. A*B will not work because the inner dimensions do not match (1x10 * 1x10). A.*B will only multiply each pair of elements as you noticed, yielding a 1x10 result.

Two potential solutions: