Fast way to multiply rows of a matrix with columns of another

Question

I have two matrices and I want to multiply each column of the first with the row of the second to get a matrix, something like:

for j=1:size(A,2)
    c(:,:,j) = A(:,j)*B(:,j)'  ;
end

A

and B

are the same size.

Is there a quick way to do this?

+3

shaloo shaloo 24 nov. 14 at 17:24

1 answer

Luis mendo · Accepted Answer · 2014-11-24T17:29:23+0000

Easy with bsxfun

:

C = bsxfun(@times, permute(A, [1 3 2]), permute(B, [3 1 2]));