
Hello,
  I have my results after running a microarray analysis. In general, the analysis is basically comparing gene expressions in 1 tumor group to another.
  Below are my relevant codes:

mm2 <- model.matrix(~TumorType, pData(eset2))
fit2 <- lmFit(eset2, mm2)
fit2 <- eBayes(fit2)

  Now I want to extract the top 50 up-regulated genes, but I am not sure how to do so. I know with toptable function, I can extract the top differentially expressed genes, but what if I only want the up-regulated ones? 

 Thanks in advance!
Sincerely,
Casper
 		 	   		  
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