If there are more than one rows of expression for the same gene, collapse this gene into one row with highest value (maximum) within the column for that gene.
This file consists of 15 columns of expression values for 15 tissues. Its a text file containing affymetrix probes of Hgu133plus2 annotation. I have tried GATEexplorer, ADAPT, BrainCDF, etc. But none of them is useful to me. Can anyone suggest a solution? I tried using Genepattern also, but my file size is just too huge to accept.