Installing/updating packages on a lab network

Just add the line

R_LIBS_SITE=F:/R/library

to the file R_HOME/etc/x64/Renviron.site

Thanks, Uwe

I have no way to test this and our IT people who do the installation 
know nothing of R, so follow-up questions:

*  There is no R_HOME/etc/x64/Renviron.site file, but there is a 
R_HOME/etc/Rprofile.site I can modify and
ask them to install.  Would the equivalent in Rprofile.site be
Sys.setenv(R_LIBS_SITE="F:/R/library")

* Does this require that the R_LIBS_SITE folder exist and be writable by 
the user?

  Here is what I see in the current version:

   .libPaths(), the library trees where R looks for packages gives:
   [1] "G:/uitapps/HEBB_R_LIB2/library"
   [2] "C:/Program Files/R/R/R-3.1.1/library"

   If I try to install a new package, e.g.,
   install.packages("rockchalk")

   I get "G:/uitapps/HEBB_R_LIB2/library is not writeable.  Use a 
personal library instead?", followed by a popup window,
   "Create ~R/library? (y/n)"

   This then installs the package, but to 
"C:/Users/friendly/Desktop/~R/library".  In the current login session, 
.libPaths() will
   then have this path, so in a new R session, load(rockchalk) will work.

   However, once I logout, all that disappears, so I have to start over 
again to install or update a package.

Michael Friendly     Email: friendly AT yorku DOT ca
Professor, Psychology Dept. & Chair, Quantitative Methods
York University      Voice: 416 736-2100 x66249 Fax: 416 736-5814
4700 Keele Street    Web:http://www.datavis.ca
Toronto, ONT  M3J 1P3 CANADA