So, I want to run some QC on an Affy data set- data0hR.
Shown are my commands and the errors thrown by simpleaffy:
>library(simpleaffy)

> data0hR.qc <- qc(data0hR)
Error in function (classes, fdef, mtable)  :
  unable to find an inherited method for function "annotation", for
signature "AffyBatch"

> avbg(data0hR.qc)
Error: object 'data0hR.qc' not found
Error in avbg(data0hR.qc) :
  error in evaluating the argument 'object' in selecting a method for
function 'avbg'

I use R on a Mac OS X 10.5.8.
Any helpful feedback will be appreciated.
Thanks,
Anjan

-- 
===================================
anjan purkayastha, phd.
research associate
fas center for systems biology,
harvard university
52 oxford street
cambridge ma 02138
phone-703.740.6939
===================================

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