character vector of package version
numbers. to install. The order must match the order of
package names in pkgs.
oldRepos
character name of repository to download
the packages old package versions from. Default is
oldRepos = "http://cran.r-project.org".
lib
character vector giving the library
directories where to install the packages. Recycled as
needed. If NULL, defaults to the first element of
.libPaths().
# Install old versions of the e1071 and gtools packages.Names <- c("e1071", "gtools")
Vers <- c("1.6", "2.6.1")
InstallOldPackages(pkgs = Names, versions = Vers)