[BioC] help needed for GCRMA

Memon, Farhat N fnmemo at essex.ac.uk
Thu Jan 14 18:55:11 CET 2010

Thanks Jim. 

I am getting error while using the following step:
cleancdf <- cleancdfname(rawdata at cdfName,addcdf=FALSE)

Any suggestion........please.

From: James W. MacDonald [jmacdon at med.umich.edu]
Sent: 14 January 2010 16:32
To: Memon, Farhat N
Cc: bioconductor at stat.math.ethz.ch
Subject: Re: [BioC] help needed for GCRMA

Hi Farhat,

Memon, Farhat N wrote:
> Hi,
> I am a new user of GCRMA package. I want to use GCRMA method to calculate expression values of some probeset for which I used the following code:
> library(gcrma)
> library(affy)
> data=ReadAffy()
> gcrma.set=gcrma(data)
> gcrma.exp=exprs(gcrma.set)
> According to my understand, this code will calculate the expression values of all the probesets. Now, I want to calculate the expression values of probesets excluding some of their probes.

See the following post:




> If anyone can help
> Regards
> Farhat
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James W. MacDonald, M.S.
Douglas Lab
University of Michigan
Department of Human Genetics
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