MATLAB: How to change non zero value into 0

Question

I want to manipulate n*n matrix such the last 10 non-zeros value in every column of matrix and change them into zero.Matrix is in the form of binary[0,1].

Answer 1

Let A - your binary array (n x n)

m = 10;
B = cumsum(A);
out = A.*(B(end,:) - m >= B);