[BioC] Calculating the average differential exprression

michael watson (IAH-C) michael.watson at bbsrc.ac.uk
Mon Feb 6 14:45:16 CET 2006


Hi

This question counts for most of the microarray packages...

When calculating the average differential expression for replicate
spots, do you take an averge of the log2(ratio)'s, or the log2 of the
average ratio?  (they come up with different numbers)

Which one and why?

Thanks
Mick



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