MATLAB: Find non-zero elements in a 3-D matrix


I have a 3-D matrix containing some non-zero numerical values.I want to find the indices of these non-zero elements.
I know find() can give me row and column, but it doesn't work for a 3-D matrix. Is there another function I can use?

Best Answer

Why do you assume, that find() does not work for 3D arrays? Of course it does work. When used with a single output, it replies the linear index. Using this is faster than the 3 separated indices, but you can use ind2sub for a conversion:
ind = find(A);
[i1, i2, i3] = ind2sub(size(A), ind);