Find non-zero elements in a 3-D matrix

Hi,

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?

[Mehri Mehrnia]

You can use nnz(matrix), it gives you number of all non-zero elements.

Answer 1

[Jan]

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);

[Azzi Abdelmalek]

More simple

[Jenny]

Yes, you are right! Thanks a lot!

[Shujaat Khan]

Thanks a lot!

[Nicholas Appiah]

How do you reshape it in the form of the original matrix