It downloads the package to a temporary file, and returns the name of the file.
download_version(package, version = NULL, repos = getOption("repos"),
type = getOption("pkgType"), ...)
package name
If the specified version is NULL or the same as the most
recent version of the package, this function simply calls
install.packages
. Otherwise, it looks at the list of
archived source tarballs and tries to install an older version instead.
character vector, the base URL(s) of the repositories
to use, e.g., the URL of a CRAN mirror such as
"http://cran.us.r-project.org"
. For more details on
supported URL schemes see url
.
Can be NULL
to install from local files, directories or URLs:
this will be inferred by extension from pkgs
if of length one.
character, indicating the type of package to download and
install. Will be "source"
except on Windows and some OS X
builds: see the section on ‘Binary packages’ for those.
Other arguments passed on to install.packages
.
Name of the downloaded file.