Works fine for me on an OS X machine running Panther 10.3.5 freshly installed with R-2.0.1 and the getBioC() script. > library(Biobase) > library(golubEsets) > find("exprs") [1] "package:Biobase" > library(golubEsets) > hist(exprs(golubMerge)) > exprs(golubMerge) [,1] [,2] [,3] [,4] [,5] [,6] AFFX-BioB-5_at -342 -87 22 -243 -130 -256 AFFX-BioB-M_at -200 -248 -153 -218 -177 -249 AFFX-BioB-3_at 41 262 17 -163 -28 -410 AFFX-BioC-5_at 328 295 276 182 266 24 AFFX-BioC-3_at -224 -226 -211 -289 -170 -535 ... Since it looks like you cannot even access the exprs object in the Biobase package (does this still exist when quiting R and re-running it?), I would suggest that something is badly wrong with your install. Easiest to probably reinstall R as administrator and then install Bioconductor using the getBioC() script. As in my previous email on OS X installation I would install the binary XML package from the pull down menus before installing Bioconductor using getBioC. marcus >>> Katie Roberts <katier23@stanford.edu> 24/11/2004 6:24:32 AM >>> Hi, I think the problem is in the downloading of the contents of the packages, when I enter library() the packages appear to be there, but then I can't access them. > library(Biobase) Loading required package: tools > library() > library(golubEsets) > hist(exprs(golubMerge)) Error in hist(exprs(golubMerge)) : couldn't find function "exprs" > exprs(golubMerge) Error: couldn't find function "exprs" Data set 'geneData' not found in: data(geneData) > data(geneCov) Warning message: Data set 'geneCov' not found in: data(geneCov) I'm using the most recent getBioC() from the website, and have tried downloading everything at once, as well as packages separately. I'm using a Mac OSX 10.3 and have also tried turning off the firewall prior to downloading, but that hasn't seemed to make a difference. thanks, Katie _______________________________________________ Bioconductor mailing list Bioconductor@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/bioconductor ______________________________________________________ The contents of this e-mail are privileged and/or confidenti...{{dropped}}