How to point rpy2 to existing R installation?

Question

I have two installations of R. Is there a way to explicitly point rpy2 to one of these?

i have no idea how rpy2 works, but i assume it uses R by console access, and the version it finds is the one in your PATH variable... if so you might have to manipulate that... but that would be a very ugly solution :) — phonixor
– phonixor, Commented Oct 31, 2014 at 13:26
It does use the PATH. I guess that @phonixor is writing all his command lines in a shell/terminal with explicit absolute paths because because of that ugly shell feature that makes it search executable in the PATH ;-) — lgautier
– lgautier, Commented Nov 18, 2014 at 15:15
no, the ugly part is that if your program is not using your systems default R, your program has to modify the PATH before launch, and restore it after :( — phonixor
– phonixor, Commented Nov 23, 2014 at 19:29

mattexx · Accepted Answer · 2014-11-16 03:05:38Z

2

I believe @phonixor is right. rpy2 uses the R it finds in the path. If you want to change that, change your path.

PATH=/path/to/r/bin:$PATH

answered Nov 16, 2014 at 3:05

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on windows, you have to set RPATH and RHOME environment variables, I believe. (working from memory and it's been a while).