[R-SIG-Mac] install.packages: location of system-wide library tree

[Sean Davis]

See help(.Library).

Sean

On Wed, May 25, 2011 at 6:35 AM, jochen laubrock
<jochen.laubrock at gmail.com> wrote:
> Dear expeRts,
>
> On (my?) macs, .libPaths() contains two entries, with the first pointing to a user's library tree and the second to the system-wide library tree, as in
>
> ## begin code
> v <- getRversion()
> userLib <- Sys.glob(sprintf("~/Library/R/%s.%s/library", v$major, v$minor))
> systemLib <- sprintf("/Library/Frameworks/R.framework/Versions/%s.%s/Resources/library", v$major, v$minor)
> userLib == .libPaths()[1]
> systemLib == .libPaths()[2]
> # both return TRUE (on my system)
> ## end code
>
> When installing new packages, I would like to make them available to all users. However, the 'lib' parameter of 'install.packages' defaults to the first element of '.libPaths()'. How do I reliably specify the location of the system library: Is it always equal to '.libPaths()[-1]'? And why is '.Library.site' empty?
>
> Jochen
>
>
>> sessionInfo()
> R version 2.13.0 (2011-04-13)
> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
>
> ----
> Jochen Laubrock, Dept. of Psychology, University of Potsdam,
> Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
> phone: +49-331-977-2346, fax: +49-331-977-2793
>
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