unix environment variables under R

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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