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Hi Sebastien, S?bastien Tourlet wrote: > hello > > I start some studies on affymetrix chips. I have not found how to put gene names into the gene expression output file in order to do a link between affyid and gene names. > Could you help me on it? You want an annotation package and mget(). Say your chip is the hgu133plus2, and you have a vector of probe ids called 'prbs'. library(hgu133plus2.db) #use biocLite() to get it if necessary. symb <- mget(prbs, hgu133plus2SYMBOL) will give you a list of gene symbols for each probe id. You can see all the mappings available by typing hgu133plus2(). Alternatively, you can use probes2table() in affycoretools to output either text or HTML tables. Best, Jim > > Thanks in advance for your reply > > Best regards > > S?bastien > [[alternative HTML version deleted]] > > > > -------------------------------------------------------------------- ---- > > _______________________________________________ > Bioconductor mailing list > Bioconductor at stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/bioconductor > Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor -- James W. MacDonald, M.S. Biostatistician Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623