Question

Matrix A: 10 rows, 50 columns

a1 a2 a3 ….

b1 b2 b3 ….

c1 c2 c3 ….
…

Matrix B: 50 rows, 10 columns

x1 x2 x3….

y1 y2 y3….

….

I would like to multiply data in each rows in Matrix A by columns(1) in Matrix B, the results will look like:

[x1*a1, x2*b1, x3*c1, x4*d1….

x1*a2, x2*b2, x3*c2, x4*d2….

x1*.

….]

Then, multiply each rows of Matrix A by columns(2) in Matrix 8:

[y1*a1, y2*b1, y3*c1, y4*d1….

y1*a2, y2*b2, y3*c2, y4*d2….

y1*. ….]

Then, by row(3) till columns(50)

I am looking for a script : )

Answer 1

You can use bsxfun.

A=rand(10,50);
B=rand(50,10);
C=bsxfun(@times,A,permute(B,[3 1 2]));

Here C(:,:,1) would be your first result matrix, and C(:,:,2) the second…