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2013 Mar 15
2
phyper returning zero
Hi,
I am attempting to use phyper to test the significance of two overlapping lists. I keep getting a zero and wondered if that was determining non-significance of my overlap or a p-value too small to calculate?
overlap = 524
lista = 2784
totalpop = 54675
listb = 1296
phyper(overlap, lista, totalpop, listb,lower.tail = FALSE, log.p=F)
[1] 0
If I plug in some different values I get a p-value but