Hello,
   
  I have applied oligo package to read in four CHIP-chip mouse promoter 1.0R dataset.
  > dat <- read.celfiles(list.celfiles(),pkgname="pd.mm.prompr.v02.1.ncbiv36)
   
  I want to use rma background correction and quantile normalization method for the next step. However, I don't know how to convert 'dat' object to class  'ExpressionSet'. Would anyone please help me? Or, any other normalization method you would like to recommend?
   
  Thanks!
   
  Yanqin

       
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