Re: Trivial question....

Max wrote:


Hey guys,

I have a very simple problem, but for a MATLAB newbie it's quite
difficult to solve it.

Assume I have (1582 x 15) matrix.

I would like to apply something like
ans=log(data(1:1582,1))-log(data((1,1)), to all the columns of the
matrix.

Or in other words: I would like to "normalize" the matrix so that
the
starting point for all m's (there are 15) is 0. How do I do that?

Thanks
Max

Suppose your data matrix is X
meanX = mean(X);
normX = X - repmat(meanX,size(x,1),1);

normX has zero column mean.
Hope it helps.

Yang
.