[R] false discovery rate !

john seers (IFR) john.seers at bbsrc.ac.uk
Thu Jul 10 16:57:23 CEST 2008



Are all your input p values the same? If so your output FDR values would
be the same.

Or are all your p-values relatively large? Then (nearly) all your FDR
values might be 1.

Why don't you put a small example up of what you did? Then we could see
what method you used etc.



-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of A Ezhil
Sent: 10 July 2008 15:41
To: r-help at r-project.org
Subject: [R] false discovery rate !

Dear All,

It is not a typical R question (though I use R for this) but I thought
someone will help me. For the list of P values, I have calculated FDR
using p.adjust() in R (bioconductor). But my FDR values are same for all
the P values. When do we get same FDR values? Does the smallest P values
should less than 1/N? (where N is the number of P values)

Thanks in advance.

Kind regards,

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