Hi Galina, where did you get the IDs from? I tried looking them up on Ensembl, but neither produced any matches. Are you sure they're correct Ensembl gene IDs? Best \Heidi > Dear list, > > > > I am trying to do very simple query using BiomaRt: > > library(biomaRt) > > ensembl=useMart('ensembl') > > ensembl= useDataset('hsapiens_gene_ensembl',mart=ensembl) > > .. > >> ids<-c("ENSG000000282326","ENSG000000008311","ENSG000000323881") > >> hsdef <- > getBM(attributes=c("ensembl_gene_id","ensembl_transcript_id","hgnc_s ymbo > l"),filters="ensembl_gene_id",values=ids, mart=ensembl) > >> hsdef > > NULL > >> > > Please let me know, am I doing something wrong? > > > > Best regards > > Galina > > PS > >> sessionInfo() > > R version 2.5.1 (2007-06-27) > > i386-pc-mingw32 > > > > > [[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 >