How can I Multiply a vector by a weight matrix

How can i multiple a 20 by 50 matrix (A) by a 20 by 20 weigting matrix(S)

i.e SA

THANK you

[Fabio Freschi]

If A is 20 by 50 and S is 20 by 20, the product S*A is defined and the result is a 20 by 50 matrix.

[Adam Danz]

Here's a quick refresher on matrix multiplication

https://www.mathsisfun.com/algebra/matrix-multiplying.html

The only thing you need to know that is Matlab related is that A*B will execute matrix multiplication. A.*B will execute element-wise multiplication.

https://www.mathworks.com/help/matlab/ref/times.html