I'm very new to R, trying to learn it. I started with R 2.4, but I have since upgraded to 2.5.0, on WindowsXP. I understand that 2.5.1 is now available.
Last night in the course of things I loaded libraries "coin" and "survival". I received warning messages that they had been built under version 2.5.1. However, as far as I could tell, they worked OK. But this brought some questions to mind: I found the remove.packages() command. Is there a way to revert a package back to a previous version without removing it? If not, and I remove one version, how do I specify downloading a particular (earlier) version? Was that warning of any consequence? Are there times when a package will not work properly with an earlier version of R, and will this be obvious to me when I try to use it? Or in a more general sense, are there foreseeable circumstances in which an older version of a package would be necessary, rather than the newest one? Should I keep my packages in a library folder outside of the R install folder? Right now, it appears that all the packages I download get installed into a library subdirectory under my R250 directory. Advantages and disadvantages of either method? Thanks. -- Christopher W. Ryan, MD SUNY Upstate Medical University Clinical Campus at Binghamton 40 Arch Street, Johnson City, NY 13790 cryanatbinghamtondotedu PGP public keys available at http://home.stny.rr.com/ryancw/ "If you want to build a ship, don't drum up the men to gather wood, divide the work and give orders. Instead, teach them to yearn for the vast and endless sea." [Antoine de St. Exupery] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.