MATLAB：将矩阵A中的每一列乘以矩阵B中的一行

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...