[BioC] Extracting normalized intensities
Jean Yee Hwa Yang
jean at biostat.ucsf.edu
Fri Sep 24 21:32:38 CEST 2004
Hi Gene,
maM extrat the normalized log-ratios. If you would like to obtain
normalized single channel log-intensities. You can simply solve the
equations for R and G.
M = (R - G)
A = (R + G) / 2
Jean
On Fri, 24 Sep 2004, Gene Cutler wrote:
> I'm a little unclear on how to extract normalized intensities from a
> marrayNorm object. The intensities in maA appear to be the original
> un-normalized intensities. There are normalization factors in maMloc
> and maMscale, but I don't know how to apply them. The maMscale look
> like multiplicative values while the maMloc look additive.
>
> Thanks.
>
>
>
> Gene Cutler
> Research Investigator
> Bioinformatics
> Amgen SF
>
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