[R-sig-Geo] r.mapcalc with spgrass6
Roger.Bivand at nhh.no
Tue Jul 6 23:42:56 CEST 2010
On Tue, 6 Jul 2010, Pinaud David wrote:
> Dear all,
> I'm trying to use the GRASS function "r.mapcalc" using R package "spgrass6",
> but I've got some trouble with it, I'm not even able to parse this function:
> Le chargement a nécessité le package : sp
> Geospatial Data Abstraction Library extensions to R successfully loaded
> Loaded GDAL runtime: GDAL 1.7.1, released 2010/02/08
> Path to GDAL shared files: C:/PROGRA~1/R/R-211~1.1/library/rgdal/gdal
> Loaded PROJ.4 runtime: Rel. 4.7.1, 23 September 2009
> Path to PROJ.4 shared files: C:/PROGRA~1/R/R-211~1.1/library/rgdal/proj
> Le chargement a nécessité le package : XML
> GRASS GIS interface loaded with GRASS version: (GRASS not running)
> Error : syntax error, unexpected '-', expecting NAME or STRING
> Parse error does not seem to be XML, nor to identify a file name
> Erreur dans parseGRASS("r.mapcalc") : r.mapcalc not parsed
You cannot use r.mapcalc with execGRASS for obvious reasons - r.mapcalc
wants to handle input itself. Use r.mapcalculator instead for scripting.
or use r.mapcalcs directly.
Hope this helps,
> I tried to change the XML encoding by
> without success.
> For example,
> is correctly running, I've got the description of the function.
> Otherwise, my calculus with "r.mapcalc" within GRASS 6.4.0 is correctly
> R version 2.11.1 (2010-05-31)
>  LC_COLLATE=French_France.1252 LC_CTYPE=French_France.1252
>  LC_NUMERIC=C LC_TIME=French_France.1252
> attached base packages:
>  stats graphics grDevices utils datasets methods base
> other attached packages:
>  spgrass6_0.6-16 XML_3.1-0 rgdal_0.6-27 sp_0.9-65
> loaded via a namespace (and not attached):
>  grid_2.11.1 lattice_0.18-8 tools_2.11.1
>> get("SYS", envir = .GRASS_CACHE)
>  "WinNat"
> Am I missing something? Any idea?
> Thank you very much for your help and patience.
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no
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