fisher exact for > 2x2 table
On Apr 28, 2011, at 4:23 PM, viostorm wrote:
I have read the help page, or at least ?fisher.exact
Then it should have been clear that more than 2x2 tables can be used.
I looked a bit on the Internet I guess it is applicable to > 2x2. I had spoken to a biostatistician here who is quite excellent and was adamant with me I could not do > 2x2. I found this: http://mathworld.wolfram.com/FishersExactTest.html Does anyone know specifically how R is calculating this?
The answer to any question like that is ... look at the source. You will see extensive use of phyper() which is calculating that expression for various arguments. ?phyper
David Winsemius, MD West Hartford, CT