[R] Transform pairwise observations into a table
AHJ
ahadjixenofontos at med.miami.edu
Mon Oct 1 18:17:53 CEST 2012
Hi,
I have a table of pairs of individuals and a coefficient that belongs to the
pair:
ind1 ind2 coef
1 1 1
1 2 0.25
1 3 0.125
1 4 0.5
2 2 1
2 1 0.25
2 3 0.125
2 4 0.5
3 3 1
3 1 0.125
3 2 0.125
3 4 0.5
4 4 1
4 1 0.5
4 2 0.5
4 3 0.5
And I want to convert it to a matrix where each individual is both a row and
a column and at the intersection of each pair is the coefficient that
belongs to that pair:
1 2 3 4
1 1 0.25 0.125 0.5
2 0.25 1 0.125 0.5
3 0.125 0.125 1 0.5
4 0.5 0.5 0.5 1
If table() would allow me to specify something other than frequencies to
fill the table with, it would be what I need. I tried a few different
combinations of t() and unique() but none of it made enough sense to post as
my starting code... I am just lost. Any help would be greatly appreciated.
Thank you,
AHJ
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