[GRASS-user] Replace 0 by NULL in categorial raster map

2012-03-02 Thread Johannes Radinger
Hi, I'd like to replace all values/categories "0" by real NULL values. Furthermore I want to do that in a Python script. I tried to do it with mapcalc in the script but then I loose the category labels: grass.mapcalc("$out= if($in==0,null(),$in)", out = "in",

Re: [GRASS-user] Replace 0 by NULL in categorial raster map

2012-03-02 Thread Moritz Lennert
On 02/03/12 15:09, Johannes Radinger wrote: Hi, I'd like to replace all values/categories "0" by real NULL values. Furthermore I want to do that in a Python script. I tried to do it with mapcalc in the script but then I loose the category labels: grass.mapcalc("$out= if($in==0,null(),$in)",

Re: [GRASS-user] Replace 0 by NULL in categorial raster map

2012-03-02 Thread Johannes Radinger
> On 02/03/12 15:09, Johannes Radinger wrote: > > Hi, > > > > I'd like to replace all values/categories "0" by real NULL values. > > Furthermore I want to do that in a Python script. I tried to do it > > with mapcalc in the script but then I loose the category labels: > > > > > > grass.mapcalc("$o

Re: [GRASS-user] Replace 0 by NULL in categorial raster map

2012-03-02 Thread Moritz Lennert
On 02/03/12 15:56, Johannes Radinger wrote: Just for my personal interest two questions: 1) What if I want to replace the category "0" with NULL (not the values 0) Category 0 = value 0. Raster values in GRASS are called categorie values. Or maybe I don't understand what you mean ? 2) What w

Re: [GRASS-user] Replace 0 by NULL in categorial raster map

2012-03-05 Thread Johannes Radinger
Hi, Original-Nachricht > Datum: Fri, 02 Mar 2012 20:22:30 +0100 > Von: Moritz Lennert > An: Johannes Radinger > CC: grass-user@lists.osgeo.org > Betreff: Re: [GRASS-user] Replace 0 by NULL in categorial raster map > On 02/03/12 15:56, Johannes Radinger wrot

Re: [GRASS-user] Replace 0 by NULL in categorial raster map

2012-03-05 Thread Moritz Lennert
On 05/03/12 15:56, Johannes Radinger wrote: Hi, Original-Nachricht Datum: Fri, 02 Mar 2012 20:22:30 +0100 Von: Moritz Lennert An: Johannes Radinger CC: grass-user@lists.osgeo.org Betreff: Re: [GRASS-user] Replace 0 by NULL in categorial raster map On 02/03/12 15:56