[R] how to set environment variables?

[Liaw, Andy]

See the first paragraph of ?Startup.

Andy

> From: Andreas Zankl
> 
> Thanks. Sys.putenv did work, however this has to be set every 
> time I start R.
> 
> gs is on my path and works fine under Unix, but I get the following 
> error when running bitmap (without setting R_GSCMD first):
> 
> /bin/sh: line 1: gs: command not found
> 
> I assume the problem is related to the fact that I am using the csh 
> shell, while the new Mac OS X default shell is now bash. So I guess 
> my .csh path settings are ignored by R calling bash. I solved the 
> problem by adding my R_GSCMD settings to the Renviron file 
> (R_GSCMD=${RGSCMD-'/sw/bin/gs'} in my case). Hope this helps anyone 
> with the same problem.
> 
> Thanks again for your help!
> Andreas
> 
> 
> 
> At 12:51 +0100 20.10.2005, Prof Brian Ripley wrote:
> >On Thu, 20 Oct 2005, Andreas Zankl wrote:
> >
> >>The help file of the R bitmap function says that I have to set the
> >>environment variable R_GSCMD to the path of my Ghostscript
> >>installation.
> >
> >Actually, it does not say that.  It says you _can_ specify the path 
> >to your executable (not the installation) that way. It will work 
> >without doing so if the executable 'gs' (on a Unix-alike) is on your 
> >path, which it normally is on Unix-alikes.
> >
> >>How do I set this variable (either by commandline or in
> >>R.app for Mac)? Sorry if this sounds like a very basic question, but
> >>I could not find the answer anywhere else.
> >
> >?Sys.putenv for how to do it from R.  help.search("environment 
> >variable") got me there.
> >
> >--
> >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 272866 (PA)
> >Oxford OX1 3TG, UK                Fax:  +44 1865 272595
> 
> 
> -- 
> PLEASE NOTE MY NEW EMAIL ADDRESS: ANDREAS.ZANKL at GMAIL.COM
> 
> --------------------------
> Andreas Zankl, MD
> Division of Molecular Pediatrics
> Clinique Infantile 02/50
> CHUV
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> 
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