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

Actually , you can do it like the code blow:

---

N=3
 for n=1:size(A,1)
   [a b]=find(A(n,:)>0,N);
   B(n,:)=A(n,transpose(b));
end

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Then I think this B matrix will be what you want.