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How to convert row and column vectors of a symmetric matrix to zero if diagonal value is zero?

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Muhammad Shafique
Muhammad Shafique 2011-6-23
I have symmetric matrices of large size. I need to ensure that if there are any zeros on the main diagonal, then their corresponding row and column vectors are also set to zero. Please help.

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Krishna Kumar
Krishna Kumar 2011-6-23
This would do it without loop- index=find(diag(your_matrix)==0); your_matrix(index,:)=0; your_matrix(:,index)=0;

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Andrei Bobrov
Andrei Bobrov 2011-6-23
dg = diag(your_matrix);
your_matrix(dg*dg'==0)=0
dg = diag(your_matrix);
l1 = dg == 0;
your_matrix(diag(l1)==1) = rand(nnz(l1),1)

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