As a  results of limma analysis I got a list of affy probesets.
After annotation some probets point to the same gene symbol.
I would like to produce an R script that remove duplicate, and for duplicate
keep only the probests with the larger A.

To be clearer I have a table as the one below and I would like to remove the
probe 2000_at because the symbol ccl5 is present twice and for the duplicate
I remove 2000_at because A (1.5) is smaller than the  2003_at A 5.25.

Symbol  Probe chip1 chp2 A
ccl5     2000_at 1.2 1.3 1.25
ccl2    2001_at 1.2 1.3 1.25
ccl5    2003_at 5.2 5.3 5.25


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Marco Fabbri
Istituto Clinico Humanitas
via Manzoni, 52
20089 Rozzano (Mi)
Tel. 028224 5152
Fax 028224 5101

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