On 05/12/2010 03:31 PM, visser wrote:
i have 2 groups i want to compare: group A and group B
each group contains let's say 20 patients
i want to perform a Fisher Exact test on genotype distribution
so, see if there is a sign diff in genotpe frequency/distribution (#AA, #AB,
#BB) between group A and B
not for 1, but for 1000 different genes
my question: how should i build my table so i can do:
test<- read.table("table1.txt")
fisher.test(test)
i know a lot is still missing in the syntax, but i do not know what. any
help would be soo much appreciated!!
Note that in this case, Fisher's exact test has a good chance of being
less accurate than an approximate Pearson chi-square test.
--
Frank E Harrell Jr Professor and Chairman School of Medicine
Department of Biostatistics Vanderbilt University
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