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DOT type element wise multiplication of two 2-D matrices with array expansion (3-D)

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palla
palla on 26 Feb 2020
Commented: palla on 26 Feb 2020
I have two 2-d matrices A(100*20) and B(20*100). I want to perform multiplication of each row of A with each column of B element wise and store the result in a 3-d matrix. How can I perform it? Thanks in advance.

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Accepted Answer

Andrei Bobrov
Andrei Bobrov on 26 Feb 2020
out3D = A .* permute(B,[3,1,2]); % for R2016a and later
out3D = bsxfun(@times,A, permute(B,[3,1,2])); % earlier R2016a

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