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. Author manuscript; available in PMC: 2011 Dec 2.
Published in final edited form as: Nat Protoc. 2011 Jun 2;6(6):870–895. doi: 10.1038/nprot.2011.328 
> chrs = levels(RefSeq$CHR)
 
# Create a list of chromosomes to be analyzed
 
> AllSm = NULL
 
# Variable to store smoothed data for all chromosomes
 
> ChrSm = NULL
 
# Variable to store smoothed data for one chromosome