How to find the index of dependent row/column in sparse matrix

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I have a sparse matrix such as

A=sparse(zeros(10,20))% 10 rows by 20 columns

Now, for each iteration, I will put random value for each column

for i=1:20
%% insert value - it is done
end

My task is that find the index of dependent row/column and replate it by zeros values for all element in the dependent row/column. For example, the full matrix A can assume as

full(A)=
        [ 
          1 1 1
          0 0 1
          1 1 1 
         ]

We see that the second column is a dependent row with first column. So my expected result such as

   full(A)=
        [ 
          1 0 1
          0 0 1
          1 0 1 
         ]

asked 1 min ago

user8264

147

How to find the index of dependent row/column in sparse matrix