Inability to access a repository index is very often an indication of a failed
internet connection from R. In Windows that is often a result of incorrect
proxy settings or other internet connection settings. The R Windows FAQ, 2.19
("The Internet download functions fail") may have the answer...
As a quick diagnostic, try running
setInternet2(use = TRUE)
as the _first_ thing after starting R. This will effectively cause R to use the
same settings as Internet Explorer. If that works, add the flag --internet2 to
the command line in the R shortcut.
If that fixes the problem, edit the Windows shortcut to include --internet2 in
the command lione.
If it fails, see Windows FAQ 2.19 (b).
have a look at either edit your local R config file to use internet2 instead of
the default, or reinstall R, setting the Internet2 option during the
installation process.
> -----Original Message-----
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
> Behalf Of Sarah Hardy
> Sent: 01 October 2014 00:01
> To: r-help@r-project.org
> Subject: [R] uninstalled and reinstalled R, now cannot install packages
>
> Hello,
>
> I have a student (running Windows 8) who ran into a problem installing the
> RcmdrPlugin.IPSUR package and, despite instructions to the contrary,
> uninstalled R and reinstalled. He uninstalled it using the Windows 8 utility.
> Now
> he cannot install any packages.
>
> Here are the error messages he gets when he gets when he trys to use the
> menu to install a package:
> > utils:::menuInstallPkgs()
> --- Please select a CRAN mirror for use in this session ---
> Warning: unable to access index for repository
> http://cran.mirrors.hoobly.com/bin/windows/contrib/3.1
> Warning: unable to access index for repository
> http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.1
> Error in install.packages(NULL, .libPaths()[1L], dependencies = NA, type =
> type) :
> no packages were specified
> In addition: Warning message:
> In open.connection(con, "r") :
> unable to connect to 'cran.r-project.org' on port 80.
>
> Here are the messages he gets when using the install.packages command (it
> doesn't matter what package he tries to install):
>
> > install.packages("rpart")
> Installing package into
> ‘C:/Users/michael.bottai/Documents/R/win-library/3.1’
> (as ‘lib’ is unspecified)
> Warning: unable to access index for repository
> http://cran.mirrors.hoobly.com/bin/windows/contrib/3.1
> Warning: unable to access index for repository
> http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.1
> Warning message:
> package ‘rpart’ is not available (for R version 3.1.1)
>
> Any help will be greatly appreciated!
>
> Thank you,
> Sarah
>
>
> --
> Sarah Hardy, PhD
> Associate Professor of Mathematics
> University of Maine Farmington
> 207-778-7124 Office: Brinkman 100
>
> [[alternative HTML version deleted]]
>
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