Fast computation of 2D summation

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Xin
Xin on 5 Apr 2018
Edited: James Tursa on 5 Apr 2018
Hello. I have two matrix, A and B and I want to compute the following 2D summation to get a 1D array T. Is it possible to use, e.g. convolution algorithm or other ones to acquire the solution? I try to use sum and it is a bit slow when A and B are large. Thanks a lot!

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Accepted Answer

James Tursa
James Tursa on 5 Apr 2018
Edited: James Tursa on 5 Apr 2018
T = reshape(B,size(B,1),[]) * A(:);

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