search for: eset1

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2007 Aug 06
1
Problems with expresso
...sso for preprocessing the hgu133a-spikein data from affycompII. But there is an error: > library(affy) > path <- "z:/Microarray/hgu133a-spikein/rawdata" > celFile <- list.celfiles(path=path,full.names=TRUE); > affyBatch <- ReadAffy(filenames=celFile[1:6]); > eset1 <- expresso(affyBatch,bgcorrect.method="rma",normalize.method="quantiles",summary.method="medianpolish") background correction: rma normalization: quantiles PM/MM correction : expression values: medianpolish background correcting...done. normalizing...done. Fehler...
2011 Nov 22
2
filtering probesets with Bioconductor?
Hi, I am relatively new to R and Bioconductor and am trying to filter the topTable that I generated of differentially expressed genes from my normlized eset file comprised of ~ 40 HG-133A Affy microarrays . I would like to see if particular probesets are represented in this list. Alternatively I would like to generate a topTable of differentially expressed genes using only specified probesets