Dear Sir, I am trying to analyze Affymetrix Rat U34A data. Since the cdf files are not in the original affy package, I downloaded rgu34acdf file as instructed. But then how can I install this file to affy package? Simplely put this file under afffy/data folder doesn't seem to work. Thanks a lot for your help. Po

Hi Zhao, Hi Thomas, you two seem to be asking the same question. The CDF data (e.g. rgu34acdf) are just normal packages, like any other package in R. To use them, use R CMD INSTALL mgu74acdf_0.1.tar.gz on the Linux (shell) command line, or if you use Windows, the "Install package from local zip file" option of the GUI. Enjoy - Wolfgang "Zhao, Po" wrote: > > Dear Sir, > > I am trying to analyze Affymetrix Rat U34A data. Since the cdf files are not > in the original affy package, I downloaded rgu34acdf file as instructed. But > then how can I install this file to affy package? Simplely put this file > under afffy/data folder doesn't seem to work. Thanks a lot for your help. > > Po >