[R] Environmental variables
Charles C. Berry
cberry at tajo.ucsd.edu
Mon Feb 2 05:16:52 CET 2009
On Sun, 1 Feb 2009, David Epstein wrote:
> I use a Mac (10.4.11 Mac Os X).
> In my .tcshrc I define an environmental variable MY.
> Is it possible to find out its value from inside R? When one loads
> R for Mac OS X Cocoa GUI written by:
> Simon Urbanek
> Stefano M. Iacus
> are files like .tcshrc read by R?
> Can I make the value of this environmental variable available to R?
Did you try starting the R GUI from the command line whilst using tcsh?
<username>% /Applications/R.app/Contents/MacOS/R &
The R GUI when started by launch'ing it picks up different environment
vars than when starting it from a shell.
And Sys.getenv() would show them.
p.s. R-sig-mac is a better place for this question.
> Sys.getenv() produces a lot of output, with the values of many environmental
> variables, but not this one.
> Do I need a file with the correct value of MY, and have both R and my Unix
> shell read the same file, or is there a better way to proceed? I want to
> avoid duplicating the information in source files, as this can lead to a
> setup that is very hard to maintain.
> Thanks for any help.
> View this message in context: http://www.nabble.com/Environmental-variables-tp21782296p21782296.html
> Sent from the R help mailing list archive at Nabble.com.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
More information about the R-help