[BioC] RMA on affy package

Rafael A. Irizarry ririzarr at jhsph.edu
Tue Nov 18 16:42:08 MET 2003


use the anti-log. if log2(y) = x, then y=2^x.

logged.expression <- exprs(rma(Data))
notlogged.expression <- 2^exprs(rma(Data))


On Tue, 18 Nov 2003, Yang Tang wrote:

> Dear All,
> 
> I am a new user of bioconductor and have a question on RMA from the affy
> package. It seems that the expression values are log transformed. Is there a
> way not to tranform it?
> 
> Thanks very much,
> 
> Yang
> ---------------------------
> Yang Tang
> Department of Neurology
> University of Cincinnati Vontz Center Rm. 2327
> Cincinnati, OH, 45267-0536
> Phone: 513-558-7078, Fax: 513-558-7009
> 
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> 
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