Hi, what is the most effective way to assign randomly the values -1,0 and 1 to a raster map, where each of the three values should occur in one third of the map.
Furthermore I'd like to assign to 10 % of the cell the values -1 and 10% the value 1 and to the remaining 80% the value 0 (or any other arbitrary combination of the three values). Is there any fast way in G7 or do I need to play with r.random, r.mask and r.mapcalc and r.patch. Maybe someone has already had such a task... so any suggestion is welcome. cheers, Johannes
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