[BioC] network analyses on genes or probesets

[Markus Schmidberger]

Hi all,

I am using affymetrix microarray data. In the raw data I have probes. 
After preprocessing (background correction, normalization and 
summarization) I have probesets. Now I can use the annotation packages 
(e.g. library(hgu133a.db)) to get the assignment between probesets and 
genes.

Are there any functions, methods (median, mean,...), literature how to 
combine probesets to genes?

I want to run some network analyses on gene level. Therefore I need some 
kind of 'gene intensity'.

Thanks
Markus

-- 
Dipl.-Tech. Math. Markus Schmidberger

Ludwig-Maximilians-Universität München
IBE - Institut für medizinische Informationsverarbeitung,
Biometrie und Epidemiologie
Marchioninistr. 15, D-81377 Muenchen
URL: http://www.ibe.med.uni-muenchen.de 
Mail: Markus.Schmidberger [at] ibe.med.uni-muenchen.de
Tel: +49 (089) 7095 - 4497