On 24/07/2012 21:57, Kirk Fleming wrote:
???Windows 7 is where I'm seeing the problem. The root problem: while I have R_HOME legitimately specified within Windows 7, and issuing 'set R_HOME' from the command line returns exactly the path I've specified, doing a Sys.getenv('R_HOME') from R returns a completely different path. I ask, "What would cause a Sys.getenv() call to return a different value than the OS does?"
A different process and hence a different environment ... this is why they are called 'environment variables' and are specific to a process.
'The command line' is actually a shell process, not the OS itself. Setting environment variables in a shell affects only that shell and those which inherit from it.
See ?R_HOME in R, which tells you that is the R process 'is normally set on startup'. 'Normally' because there are many ways to start R (embedded, for example: see 'Writing R Extensions'), and you have not actually told us how you started R. But Rgui.exe and Rterm.exe do always set R_HOME.
-- Brian D. Ripley, rip...@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 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
