I am trying to make P/A calls at probeset level for Mouse gene ST 2.1 array using Oligo.
Here is what I did for probeset level P/A calls:
celFiles <- list.celfiles()
affyRaw <- read.celfiles(celFiles)
genePS <- rma(affyRaw, target = "probeset")
genePS_dabg <- paCalls(affyRaw,"PSDABG")
genePS_dabg_call = exprs(genePS_dabg)
But when I ran "genePS_dabg_call = exprs(genePS_dabg)", an error came out. It was written as
Error in (function (classes, fdef, mtable) :
unable to find an inherited method for function ‘exprs’ for signature ‘"matrix"’
What's the problem here?