I am a bit new to R Bioconductor and microarray analysis.
I have loaded a GEO series matrix file (GSE2990) from GEO database in R Bioconductor. This dataset contain expression values of 22283 probes. I wish to get the expression values for the genes for the dataset. Since, there are multiple probes for an individual gene in many cases, I would like to know if there is a package /R code that can combine the expression values of multiple probes for the same gene. Also does oneChannel GUI has this feature? [Please note that I wish to work with a processed GEO dataset ]