Helena Herrera wrote: > Greetings > I have 4 bands (B1;B2,B3;B4) all with values >0 except in a few > pixels where I have nulls.I want to create a layer where I have > 1 if at least I have 1 number and nulls where I don't have a > single value > I have tried thisif (B1>=0 || B2>=0 || B3>=0 || B4>=0, 1,null()) > but I got null in pixels where I have information for at least 2 > bands.any tip on how can I do this? Thanks
two ideas: use r.patch then r.mapcalc if(!isnull(patch_map),1,null()) or maybe 'r.series method=count' then r.reclass. have a look at r.mapcalc's "|||" instead of "||". Hamish _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user