dear all,

I am trying to plot different gene/transcript/exon expressions from exon 
affymetrix chips by using the function 'xmapGene' or 'xmapBridge' 
(package exonmap). but when I start these functions I get an error 
message, that I have to use <S4 object of class "ExpressionSet"> for 
value 'eset'. I used this code:

 > raw.data = read.exon()
 > raw.data@cdfName = "exon.pmcdf"
 > affy.rma = rma(raw.data)
Background correcting
Normalizing
Calculating Expression
 > xmapDatabase("Human")
done.
 > xmapGene("ENSG00000128655", *eset=affy.rma*, 
use.bridge=TRUE,gps=list(A=1:3,B=4:6),type="fc",overwrite=FALSE)
Error in xmapGene("ENSG00000128655", *eset = affy.rma*, use.bridge = 
TRUE,  :
  unused argument(s) (*eset = <S4 object of class "ExpressionSet">*, 
use.bridge = TRUE, gps = list(A = 1:3, B = 4:8), type = "fc", overwrite 
= FALSE)

I thought that the function rma() results in an S4 object of the class 
"exprSet", isn't it??? and is "exprSet"the same like "ExpressionSet"?  
Is there any chance to get an S4 object of class "ExpressionSet???

as covdesc file I use following:

        tissue
prostate_A.CEL prostate
prostate_B.CEL prostate
prostate_C.CEL prostate
tissue_mix1_A.CEL      mix1
tissue_mix1_B.CEL      mix1
tissue_mix1_C.CEL      mix1
tissue_mix1_D.CEL      mix1
tissue_mix1_E.CEL      mix1

help would be great:)
thx
paul

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