> > On 02/01/2011 03:28 PM, Johannes Radinger wrote: > > Hello, > > > > I am running GRASS GIS 6.5 and want to run a python script > > including a mapcaluculator-expression of a simple formula: > > > > A=if(B,C) > > > > grass.mapcalc("$upstream_shreve = if(${upstream_part},${shreve})", > > upstream_shreve = options['upstream_shreve'], > > upstream_part = options['upstream_part'], > > shreve = options['shreve']) > > > > but that isn't working... I don't know whats excaclty the problem.... > > I don't know anything about python, but I had a similar problem under R, > where the problem was escaping of the formula - the formula needed to be > enclosed in " in grass. > To diagnose: can you see the command executed under GRASS? Does it work > if you paste this into GRASS? > > Cheers, > > Rainer
hello, I still don't know whats the exact problem. And it is not directly possible to paste it into GRASS as the options[] command is processed by the g.parser module in the end of my script. That's sofar as I understand... I am not sure if something is wrong with ' and " or with the options-commands. According to the manual (http://grass.osgeo.org/wiki/GRASS_and_Python#Example_for_embedding_r.mapcalc_.28map_algebra.29) it should work that way... hopefully someone can help me... cheers johannes > > > > > > hopefully you can help me > > > > thanks > > Johannes > > > - -- > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation > Biology, UCT), Dipl. Phys. (Germany) > > Centre of Excellence for Invasion Biology > Natural Sciences Building > Office Suite 2039 > Stellenbosch University > Main Campus, Merriman Avenue > Stellenbosch > South Africa > > Tel: +33 - (0)9 53 10 27 44 > Cell: +27 - (0)8 39 47 90 42 > Fax (SA): +27 - (0)8 65 16 27 82 > Fax (D) : +49 - (0)3 21 21 25 22 44 > Fax (FR): +33 - (0)9 58 10 27 44 > email: rai...@krugs.de > -- NEU: FreePhone - kostenlos mobil telefonieren und surfen! Jetzt informieren: http://www.gmx.net/de/go/freephone _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user