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2005 Apr 20
1
negative p-values from fisher's test (PR#7801)
Full_Name: Martha Nason
Version: 2.0.1
OS: Windows XP
Submission from: (NULL) (137.187.154.154)
I am running simulations using fisher's test on 2 x c tables and a very small
p.value from fisher's test (<2.2e-16) is returned as a negative number. Code
follows.
> set.seed(0)
> nreps.outer <-7
> pvalue.fisher <- rep(NA,nreps.outer)
>
> population1 <- c(
2002 Jun 13
1
bad fisher.test() bug (PR#1662)
...8a12f00,
expect=0x89dad68, percnt=0x89dad90, emin=0x89dadb8, prt=0x89dade0,
pre=0x89dae08, fact=0x403b3020, ico=0x403b302c, iro=0x403b3038,
kyy=0x403b3044, idif=0x403b3050, irn=0x403b3058, key=0x403b49d4,
ldkey=0xbfffc398, ipoin=0x403b5d44, stp=0x403b70b0, ldstp=0xbfffc39c,
ifrq=0x403ffef4, dlp=0x4046d450, dsp=0x4046fb30, tm=0x40472210,
key2=0x404748f4, iwk=0x403b3060, rwk=0x403b3d30)
at ../../../../../R/src/library/ctest/src/fexact.c:524
524 obs += fact[ico[j]] - dd;
Martin
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r-dev...
2000 Aug 25
3
unexpected R crash - again
Sorry, but I lost this thread, so I sending this as a new message.
This is really a follow-up to a post from a couple days ago saying that
fisher.test from the ctest library crashed on the following data set:
> T
[,1] [,2]
[1,] 2 1
[2,] 2 1
[3,] 4 0
[4,] 8 0
[5,] 6 0
[6,] 0 0
[7,] 1 0
[8,] 1 1
[9,] 7 1
[10,] 8 2
[11,]