[R] How to retrieve data from a matrix

[ginger]

I have a data set (data.txt) containing information on affection status
(1=affected; 0=not affected) for some subjects identified by an ID. Then I
have a sort of correlation matrix of the same subjects (matrix.txt). For
each affected subject in the data set I have to retrieve the IDs of
unaffected subjects from the matrix (if the condition “affected-unaffected
correlation<0.0165” is satisfied) and such IDs should  be placed in new
columns of the data set on the affected subject corresponding row.
Does anybody can help me?
data.txt <http://r.789695.n4.nabble.com/file/n4649721/data.txt>   matrix.txt
<http://r.789695.n4.nabble.com/file/n4649721/matrix.txt>  



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