Entering edit mode
Song, Guangchun
▴
30
@song-guangchun-109
Last seen 10.2 years ago
When I try to install packages from CRAN under the menu of Packages,
it
always gives me the following messages:
> {a <- CRAN.packages()
+ install.packages(select.list(a[,1],,TRUE), .libPaths()[1],
available=a)}
trying URL `http://cran.r-project.org/bin/windows/contrib/PACKAGES'
unable to connect to 'cran.r-project.org'.
Error in download.file(url = paste(contriburl, "PACKAGES", sep = "/"),
:
cannot open URL
`http://cran.r-project.org/bin/windows/contrib/PACKAGES'
What's wrong?
Thanks.
Guangchun