After entering “library(rpart)”, I tried to plot an existing rpart tree, and got this error message: Error: couldn't find function "plot.rpart". However, “?plot.rpart” does bring up the help for the function. The same things occur for text.rpart, although print(my.tree) does work.
So, I tried to re-install rpart using Packages | Install from CRAN, but then I get this message:––––––––––––––––––––––––––––––––––––––––––––––––––- > local({a <- CRAN.packages() + install.packages(select.list(a[,1],,TRUE), .libPaths()[1], available=a)}) trying URL `http://cran.r-project.org/bin/windows/contrib/1.7/PACKAGES' Content type `text/plain; charset=iso-8859-1' length 12560 bytes opened URL downloaded 12Kb trying URL `http://cran.r-project.org/bin/windows/contrib/1.7/rpart_3.1-12.zip' Content type `application/zip' length 231827 bytes opened URL downloaded 226Kb Error in unpackPkg(foundpkgs[okp, 2], pkgnames[okp], lib, installWithVers) : Can not remove prior installation of package –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Evidently I need to uninstall first, but I can’t figure out how. I’ve looked in the pdf manuals, in the R FAQ, and in the R for Windows FAQ, and don’t find instructions for doing so. I’d appreciate any help. Thanks. Dave Parkhurst ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help