arrays - Multiply matrix to vector

Question

I've got matrix A(n,m) and I want multiply it to vector b(n), so that the result B[n,m]=A[n,m]*b[n]. It is possible to do it by creating a new matrix C=b*ones(1,m) and then use dot multiplication: B=A.*C, but it is waste of memory (size of A is 5000*1000). It is possible to use loops. Maybe there are more elegant way to do it?

Answer 1

Use bsxfun, which is just for that:

B = bsxfun(@times, A, b(:));