Hi,

I have 8 CEL files and I am going to perform variance stabilization on them. then I did like below

setwd("E:/Affy data")
library(affy)
library(vsn)

celFiles <- list.celfiles()
affyraw=ReadAffy(filenames = celFiles)
affyraw.vsn2=vsn2(affyraw)
vsn2: 506944 x 8 matrix (1 stratum). Please use 'meanSdPlot' to verify the fit.

but hereafter I don't know how to save the normalized file in a txt file because when I wrote like below I got these errors

write.table(affyraw.vsn2, file = "arrayvsn.txt", dec = ".", sep = "\t", quote = FALSE)
Error in as.data.frame.default(x[[i]], optional = TRUE) : 
  cannot coerce class "structure("vsn", package = "vsn")" to a data.frame
write.table(affyraw, file = "arrayvsn.txt", dec = ".", sep = "\t", quote = FALSE)
Error in as.data.frame.default(x[[i]], optional = TRUE) : 
  cannot coerce class "structure("AffyBatch", package = "affy")" to a data.frame

May you help me?

Thank you