Hi Merja, We have developed the Illumina IDMapping Metadata packages for this kind of conversion. For Human, you can use the lumiHumanIDMapping.db package in developing version of Bioc 2.3: http://www.bioconductor.org/packages/2.3/data/annotation/html/lumiHuma nIDMap ping.db.html For more details, please read the " IlluminaAnnotation.pdf" vignette in the lumi package (developing version 1.7.20). For example: You can use nuID2probeID function in the : nuID2probeID(nuID, lib.mapping = "lumiHumanIDMapping.db") Tell me if you have any questions. Pan On 9/2/08 11:31 AM, "Merja Heinaniemi" <merja.heinaniemi at="" uni.lu=""> wrote: > Dear Pan, > > Two simple questions but I just stumbled on these trying to finish my > analysis: > 1) I wanted to make a simple NuID to probeID conversion, my data is Illumina > Human v3. I got an error message that LumiHumanAll.db does not support the id > conversion. Is this true or am I just doing sth wrong? > > 2) If I have a vector with ProbeIDs that I am interested in and a normalized > LumiBatch object from this same Illumina array type, how do I take out from > the whole dataset just expression values for the specified ProbeIDs?? I want > to make a heatmap from data of these probes (this set of probes was sign > regulated under my comparisons). > > Kind regards, > > Merja Hein?niemi > >