[GRASS-stats] Using GRASS addons in R on Windows

[Helmut Kudrnovsky]

>The link is *not* to CRAN, and a lot more testing will  be needed before I
even submit to CRAN - re your link from GRASS-dev to this thread. I need to
know that use cases of g.extensions installed workflows now succeed where
previously they failed for OSGeo4W and native Windows builds of GRASS. CRAN
isn't used for speculating about possibilities that things might (or might
not) work - that is R-forge, from which you may svn update, then R CMD build
rgrass7, then R CMD INSTALL --build rgrass7_0.1-4.tar.gz (using RTools),
then install from local zip file, then run the workflow.

>There are other pending edits to vector file transfer on Windows, so the
extensions issue isn't alone enough to trigger a submission to CRAN. 

now tested with winGRASS standalone:

-----------------------  

GRASS version: 7.1.svn                                                          
GRASS SVN revision: 67543                                                       
Build date: 2016-01-11                                                          
Build platform: x86_64-w64-mingw32                                              
GDAL: 1.11.3                                                                    
PROJ.4: 4.9.2                                                                   
GEOS: 3.5.0                                                                     
SQLite: 3.7.17                                                                  
Python: 2.7.5                                                                   
wxPython: 2.8.12.1                                                              
Platform: Windows-7-6.1.7601-SP1   

----------------------- 

> execGRASS("r.watershed", elevation="elevation", threshold=10000,
> accumulatio$
SECTION 1a (of 5): Initiating Memory.
SECTION 1b (of 5): Determining Offmap Flow.
 100%
SECTION 2: A* Search.
 100%
SECTION 3a: Accumulating Surface Flow with MFD.
 100%
SECTION 3b: Adjusting drainage directions.
 100%
SECTION 4: Watershed determination.
 100%
SECTION 5: Closing Maps.
 100%

----------------------- 

> execGRASS("r.stream.order", stream_rast="mystreams",
> direction="myflowdir", $
All in RAM calculation...
Reading raster map <mystreams>...
 100%
Reading raster map <myflowdir>...
 100%
Finding nodes...
Calculating Strahler's stream order...
Writing output raster maps...

----------------------- 

> execGRASS("r.slope.aspect", elevation="elevation", slope="myslope",
> aspect="$
 100%
Aspect raster map <myaspect> complete
Slope raster map <myslope> complete

----------------------- 

> execGRASS("r.roughness.vector", elevation="elevation", slope="myslope",
> aspe$
Error in system(cmd0, intern = TRUE) : 'r.roughness.vector.exe' not found
Error in parseGRASS(cmd, legacyExec = legacyExec) :
  r.roughness.vector not found

----------------------- 

> execGRASS("r.reclass.area", input="zipcodes",
> output="zipcode_larger2000ha",$
Error in system(cmd0, intern = TRUE) : 'r.reclass.area.exe' not found
Error in parseGRASS(cmd, legacyExec = legacyExec) :
  r.reclass.area not found

-----------------------

it seems to be same that python scripts (python GRASS GIS scripts and python
addon scripts) aren't reckognized.



-----
best regards
Helmut
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