if i have two lists of differentially regulated genes (they could be from 2 different statistical tests, or differentially regulated genes in two treatment groups) which id like to compare, how would those with R/Bioconductor experience suggest i perform list comparisons to answer the following questions: what is common between list 1 and 2? what is in list 1 and not in 2? what is in 2 but not 1? your advice is greatly appreciated. -- Rahul Kakkar M.D. Postdoctoral Fellow Elizabeth M. McNally Laboratory Department of Medicine, Division of Cardiology University of Chicago Hospitals Chicago, IL USA

See help("%in%"). Sean On 1/16/04 3:14 PM, "Rahul Kakkar M.D." <rkakkar@uchicago.edu> wrote: > if i have two lists of differentially regulated genes (they could be from 2 > different statistical tests, or differentially regulated genes in two > treatment > groups) which id like to compare, how would those with R/Bioconductor > experience suggest i perform list comparisons to answer the following > questions: > > what is common between list 1 and 2? > what is in list 1 and not in 2? > what is in 2 but not 1? > > your advice is greatly appreciated.