MATLAB: Multiplying each column of a matrix with a specific value

columnmatrixmultiplicationscalar

I have a matrix
mat=[2,1,0,0;1,0,0,0;0,0,0,1]
I want to multiply the first column by 25, the second column by 5, the third column by 10 and the fourth column by 1 in a way that I get:
mat=[50,5,0,0;25,0,0,0;0,0,0,1]
Also, can the answer be generalized as I might end up adding more rows later on.
Thanks

Best Answer

mat=[2,1,0,0;1,0,0,0;0,0,0,1]; % 2D matrix
f = [25,5,10,1]; % row vector
result = f .* mat; % element-wise multiply with virtual expansion of row vector
If you have an earlier version of MATLAB, then use bsxfun:
result = bsxfun(@times,f,mat); % same functionality as f .* mat
Related Question