How to find the indices of nonzero rows in a matrix?

Question

How to find the indices of nonzero rows in a matrix?

Example:

A = [
       14  0  6  9  8  17
       85 14  1  3  0  99
       0   0  0  0  0   0 
           


        

Answer 1

Use

[i,~] = ind2sub(size(A),find(A));

v = unique(i);

Result for the matrix given above:

v = unique(i')

v =

     1     2     4     6