Hello,
I have indicators for the present of absent of a snps in columns and the
categorey (case control column). I would like to extract ONLY the tables and
the indices (SNPS) that give me 2 x 3 tables. Some gives 2x 2 tables when
one of the allelle is missing. The data look like the matrix snpmat below:
so the first snp should give me the following table: (aa=0, Aa=1 and AA=2)

             aa         Aa         AA
case      2            3           0
control   2            2           0

So I should not use this one or if I am using it, then I need to see  0 0 in
to AA column which I don't see when I use the table command in R.



snpmat


category   SNP1     SNP2     SNP3    ....     SNPN
case           1            0            2                     1
case           0            1            1                      2
case           1            2            2                     0
control         0           1             0                    1
control         1           2            1                     2
control         0           0            0                     0
case            1           0            2                     2
case            0           1            2                    1
control          1          0            0                     1


-- 
Thanks,
Jim.

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