[BioC] Biological duplicates

[ab19 at sanger.ac.uk]

Hello,

I am working with a set of Affymetrix arrays, all of the same type, among
which there is for each sample a biological duplicate. I was wondering
when I should "group" the duplicates : before normalizing ? After ? I
can't either find how to do it properly, do you have suggestions ?

Thanks a lot for the help you may provide !

Amelie



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