[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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