Dear R users, I am wondering about the following results:> p.adjust(c(0.05,0.05,0.05),"fdr")[1] 0.05 0.05 0.05> p.adjust(c(0.05,0.04,0.03),"fdr")[1] 0.05 0.05 0.05 Why does p.adjust(..., "fdr") not adjust p-values, if they are constant? Does somebody have an explanation or can point to a reference? Thanks in advance, Will
This is correct. Wikipedia is not bad, and provides some references. Another web page: courses.ttu.edu/isqs6348-westfall/images/6348/BonHolmBenHoch.htm <courses.ttu.edu/isqs6348-westfall/images/6348/BonHolmBenHoch.htm> Jeremy On 7 October 2010 10:37, <will.eagle@gmx.net> wrote:> Dear R users, > > I am wondering about the following results: > > p.adjust(c(0.05,0.05,0.05),"fdr") > [1] 0.05 0.05 0.05 > > p.adjust(c(0.05,0.04,0.03),"fdr") > [1] 0.05 0.05 0.05 > > Why does p.adjust(..., "fdr") not adjust p-values, if they are constant? > Does somebody have an explanation or can point to a reference? > > Thanks in advance, > > Will > > ______________________________________________ > R-help@r-project.org mailing list > stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- Jeremy Miles Psychology Research Methods Wiki: researchmethodsinpsychology.com [[alternative HTML version deleted]]