Find the first N non-zero elements in each row of a matrix

Question

I have a matrix in MATLAB with zeroes and I would like to get another matrix with the first N non-zero elements in each row. Let\'s say for example N = 3<

Answer 1

N = 3;
for ii=1:size(A,1);
    B(ii,:) = A( ii,find(A(ii,:),N) );
end