Hi all! I have just installed R and library affy. I have already loaded mgu74av2cdf. However when I try the following command > Data1<-ReadAffy(x.CEL,y.CEL) I get the following error. ******************************************************************** > Data1 Environment mgu74av2cdf is not available. This environment contains needed probe location information. We will try to download and install the mgu74av2cdf package. Note: No specified download type, defaulting to Source [1] "Attempting to download mgu74av2cdf from BIOCcdf/" Error in download.file(fileURL, destFile, mode = "wb", quiet = TRUE, method = method) : unsupported URL scheme Error in inherits(cdf.env, "try-error") : Object "cdf.env" not found ********************************************************************* I am using linux. Please suggest what you think I might be missing. THanks. Stephen.

Stephen, as you might have found it in a later email on this mailing list, there are some quirks with the automagic download of cdfenvs. You may try to download & install it manually (see Robert Gentleman's recent answer to a similar question: https://www.stat.math.ethz.ch/pipermail/bioconductor/2003-September/00 2505.html ). Hopin' it helps, L. On Thu, Sep 25, 2003 at 06:54:29PM +0200, Stephen Nyangoma wrote: > Hi all! > > I have just installed R and library affy. I have already loaded > mgu74av2cdf. However when I try the following command > > Data1<-ReadAffy(x.CEL,y.CEL) > > I get the following error. > > ******************************************************************** > > Data1 > Environment mgu74av2cdf is not available. > This environment contains needed probe location information. > We will try to download and install the mgu74av2cdf package. > > Note: No specified download type, defaulting to Source > [1] "Attempting to download mgu74av2cdf from BIOCcdf/" > Error in download.file(fileURL, destFile, mode = "wb", quiet = TRUE, > method = > method) : > unsupported URL scheme > Error in inherits(cdf.env, "try-error") : Object "cdf.env" not found > ********************************************************************* > > I am using linux. Please suggest what you think I might be missing. > > THanks. Stephen. > > _______________________________________________ > Bioconductor mailing list > Bioconductor@stat.math.ethz.ch > https://www.stat.math.ethz.ch/mailman/listinfo/bioconductor -- -------------------------------------------------------------- Laurent Gautier CBS, Building 208, DTU PhD. Student DK-2800 Lyngby,Denmark tel: +45 45 25 24 89 http://www.cbs.dtu.dk/laurent