Hi all,
I am trying to construct a pairwise coocurrence matrix for certain terms
appearing in a number of documents. For example I have the following table
with binary values showing the presence or absence of a certain term in a
document:

     term1 term2 term3 term4 term5 doc1 1 1 0 0 1 doc2 1 1 0 1 1 doc3 1 0 0
0 1

And I want to have a matrix with the number of the pairwise coocurrencies.
So, based on the above table the matrix should be:

     term1 term2 term3 term4 term5 term1 0 2 0 1 3 term2 2 0 0 1 2 term3 0 0
0 0 0

term4
1 1 0 0 1

term5
3 2 0 1 1
Any ideas on how to do that?

Tahnks
Tax

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