MATLAB: How to change an entire column.

Question

Hi,

I have a matrix with a dimension of 10×640. The matrix is filled with ones and zeros. If there is a zero in one of columns, I want the entire column to be zeros. How can I do this?

Example:

[[1,0,1];[1,1,1]]

Output should be:

[[1,0,1];[1,0,1]]

Answer 1

 A = randi(10,[10 640])-1;
 B = A;
 B(:,sum(A==0)>0)=0;