[R] Fisher's Test 5x4 table
Gerrit Eichner
Gerrit.Eichner at math.uni-giessen.de
Fri Aug 28 08:56:08 CEST 2015
Dear Paul,
quoting the email-footer: "PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html and provide commented,
minimal, self-contained, reproducible code."
So, what exactly did you try and what was the actual problem/error
message?
Besides that, have you noted that two of you data rows have the same name?
Have you read the online help page of fisher.test():
?fisher.test
Have you tried anything like the following?
W <- as.matrix( read.table( "w.txt", head = T)[-1])
fisher.test( W, workspace = 1e8)
# For workspace look at the help page, but it presumably
# won't work because of your sample size.
set.seed( 20150828) # for reproducibility
fisher.test( W, simulate.p.value = TRUE, B = 1e5)
# For B look at the help page.
Finally: Did Minitab really report "p > 0.001"? ;-)
Hth -- Gerrit
> Dear all,
> I am trying to do a fishers test on a 5x4 table on R
> statistics. I have already done a chi squared test using Minitab on this
> data set, getting a result of (1, N = 165.953, DF 12, p>0.001), yet using
> these results (even though they are excellent) may not be suitable for
> publication. I have tried numerous other statistical packages in the hope
> of doing this test, yet each one has just the 2x2 table.
> I am struggling to edit the template fishers test on R to fit
> my table (as according to the R book it is possible, yet i cannot get it to
> work). The template given on the R documentation and R book is for a 2x2
> fisher test. What do i need to change to get this to work? I have attached
> the data with the email so one can see what i am on about. Or do i have to
> write my own new code to compute this.
>
> Yours Sincerely,
> Paul Brett
>
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