[R-sig-Geo] read GRASS6 from outside

[Alex Mandel]

Roger Bivand wrote:
> On Thu, 13 Nov 2008, Patrick Giraudoux wrote:
> 
>> Roger Bivand a écrit :
>>> On Thu, 13 Nov 2008, Patrick Giraudoux wrote:
>>>
>>>> Dear listers,
>>>>
>>>> I am using GRASS6 embedded within QGIS under Windows for teaching
>>>> purpose. This prevents reading GRASS objects from R within GRASS (R
>>>> cannot be launched within GRASS in this configuration).
>>>
>>> Patrick,
>>>
>>> Could you explain why not? I can launch it, and I know others can, at
>>> least by:
>>>
>>> Plugins -> GRASS -> Open GRASS Tools -> shell
>>>
>>> and typing the full path to Rgui.exe at the shell prompt, for me:
>>>
>>> $ "C:/Program Files/R/R-2.8.0/bin/Rgui.exe"
>>>
>>> You may need to set the path to R_LIBS in user environment variables,
>>> or to add it to the command line in the GRASS shell prompt, or use
>>> .libPaths() within R, but beyond that, things should work, including
>>> file transfer etc.
>>>
>>> The startup message in the current release does say "GRASS not
>>> running" because QGIS does not set the GRASS_VERSION or LOCATION_NAME
>>> environment variables, but does set GISRC - I'll try to fix that.
> 
> This should be fixed in the version of the package just submitted to
> CRAN. It is worth noting, however, that it hasn't been tested on GRASS <
> 6.3, but works - giving the correct GRASS version and LOCATION - on
> Linux (of course!), Windows Cygwin, Windows native GRASS, and QGIS 0.11
> GRASS plugin.
> 
> The Windows native GRASS also needs the full path to Rgui.exe entered
> into the lower panel of the Output - GIS.m window, followed by -> Run.
> If there are any GRASS or QGIS developers online - might it be possible
> to put R on a button with the full path string somewhere in an editable
> option?
> 
> Roger
> 

I filed the request with the QGIS team since I'm active over there.
Thanks for working out the details.

Alex