Question

I am trying to do this operation bellow but it is really slow for a large matrix if you use for loops.
Can someone help to do this operation? We know that Y,A,M are matrix and mean is a column.

Thank you

Y=zeros(s,y);
for i=1:y
   Y(:,i)=A*(M(:,i)-mean); 
end

Answer 1

Y = A * (M - repmat(mean, 1, y));