[R] Environment variables under Windows

[Prof Brian D Ripley]

On Thu, 10 Oct 2002, John Miyamoto wrote:

> Greetings,
>
> I have a question pertaining to the concept of "environment variables"
> that is mentioned in the R documentation for "Startup" and also in the
> discussion of the Windows configuration of R in the recent book "An
> Introduction to R" authored by Venables, Smith, and the R Development Core
> Team (referred to as VS in this message).
>
> The Startup documentation and VS make reference to environment variables,
> e.g., R\_ENVIRON, R_USER, or R\_PROFILE.  Apparently the R startup
> procedure operates differently depending on whether these variables are
> "set" or "unset".  What is unclear to me is how to set these variables.
>
> For example, is something to be done with the AUTOEXEC.BAT file or the
> CONFIG.SYS file, or perhaps one must alter the Properties of the shortcut
> icon for R?  Another possibility is that one must insert some lines in the
> RProfile file.  On my installation I have two files names RProfile.  The
> first is in the directory \rw1041\etc, and the second is in the directory,
> \rw1041\library\base\R.  Does one "set" an environment variable by placing
> an appropriate line in a RProfile file?

No. See the rw-FAQ questions 2.2 and 3.2.

You either use the command line or the .Renviron file (just as is
documented for Unix).

Please upgrade from rw1041 to rw1060 first.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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