[R] unix environment variables under R

[ripley@stats.ox.ac.uk]

source(file.path(Sys.getenv("PROJECT"), "xxx.R"))

and please try not to expect sloppy sh-shell programming to work
in any other language.

On Tue, 29 Oct 2002, Jan Malte Wiener wrote:

> Jason Turner wrote:
> > On Tue, Oct 29, 2002 at 10:11:09AM +0100, Jan Malte Wiener wrote:
> > ...
> >
> >>thought a UNIX environment variable could be the solution, but R doesn't
> >>seem to know about the environment variables.
> >>e.g. >> source("$PROJECT/xxx.R") results in
> >> >> Error in file(file, "r") : unable to open connection
> >>
> >>is there something like environment variables for R?
> >
> >
> > Yep.  Sys.getenv()
> >
> > Cheers
> >
> > Jason
>
> thanks for your answer,
> but how do i source a file using that environment variable; if the
> environment variable holds a path to a directory and i want to source a
> file within that directory??
> e.g.:
> Sys.putenv("ABC"="~/R-Stuff/")
> in ~/R-Stuff there a bunch of R-files
> now i want to source one of these R-files using the ABC environment
> variable.
> sorry, but i do not know how to do this ?
>
> greetinx jan
>
> --
> Jan Malte Wiener
> Max-Planck-Institute for Biological Cybernetics
> Spemannstr. 38, 72076 Tuebingen, Germany
> Tel.: +49 7071 601 631
> Email: jan.wiener at tuebingen.mpg.de
>
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-- 
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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