MATLAB: Check the matrix result

Question

How can i check the entire matrix zero or not

M(sum)=0

Answer 1

~any(M(:))

will be true if M is entirely 0

I am not sure if your (sum) is intended to convey anything? Are you asking whether the sum over M is 0? If so then,

if ~sum(M(:))

Note, though, that this would be subject to round-off and cancellation problems; there are other techniques to use if you need to be concerned about those.