From: <pantd_at_unlv.nevada.edu>

Date: Thu 28 Jul 2005 - 17:44:42 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jul 28 17:48:42 2005

Date: Thu 28 Jul 2005 - 17:44:42 EST

Quoting Uwe Ligges <ligges@statistik.uni-dortmund.de>:

> Answering both messges here:

*>
**>
**> 1. pantd@unlv.nevada.edu wrote:
**> > Hi I appreciate your response. This is what I observed..taking
**> > the log transform of the raw gamma does change the p value of
**> > the test. That is what I am importing into excel (the p - values)
**>
**> Well, so you made a mistake! And I still do not know why anybody realy
**> want to import data to Excel, if the data is already in R.
**>
**> For me, the results are identical (and there is no reason why not).
**>
**>
**> > and then calculating the power of the test (both raw and
**> > transformed).
**> >
**> > can you tell me what exactly your code is doing?
**>
**> See below.
**>
**>
**> 2. pantd@unlv.nevada.edu wrote:
**> > Hi
**> > I ran your code. I think it should give me the number of p values below
**> 0.05
**> > significance level (thats what i could understand from your code), but
**> after
**> > running your code there is neither any error that shows up nor any value
**> that
**> > the console displays.
**>
**> You are right in the point what the code I sent does:
**>
**> erg <- replicate(1000, {
**> x<-rgamma(10, 2.5, scale = 10)
**> y<-rgamma(10, 2.5, scale = 10)
**> wilcox.test(x, y, var.equal = FALSE)$p.value
**> })
**> sum(erg < 0.05) # 45
**>
**>
**> and it works for me. It results in a random number close to 50, hopefully.
**>
**> Since both points above seem to be very strange on your machine: Which
**> version of R are you using? We assume the most recent one which is R-2.1.1.
**>
**> Uwe Ligges
**>
**>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jul 28 17:48:42 2005

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