performance - Efficiently creating a certain matrix with MATLAB -

performance - Efficiently creating a certain matrix with MATLAB -

i have 1 x n vector , 1 x m vector b. want create n x m matrix j-th row vector a(j) * b. have been doing in matlab with

[m1, m2] = meshgrid(b, a); m = m1.*m2

since n, m big in problem, looking efficient way create matlab this, , suspect makeshift hack not answer. in advance help!

try

m = bsxfun(@times, a.', b);

on computer, several times faster original code vectors thousands of elements.

performance matlab matrix vectorization