Hi Everybody, I have a list of illumina probe ID's (ILMN_#####) and I'd like to subset the matrix of expression values (exprs(lumi.batch.object) by probe ID, i.e. row names. Is there an obvious (and quick) sub-setting method to do that? If I use plotSampleRelation I can choose a selection of probes (selProbe parameter) but I guess it has to be as numeric vector, am I correct? In fact I tried to put the character vector containing probeID/row names and it didn't work... thank you and really sorry if the question is too basic for you... Regards, Emanuele