[GRASS-user] r.mapcalc problem ?

[Glynn Clements]

Juan Carlos Torres wrote:

> I think that your second command is correct. That is
> 
> 
> r.mapcalc 'test = if(mydem < 0.0000,mydem,null())'
> 
> Probably your problem is that your are drawing the new map on top of the 
> older one.
> Just try to erase the monitor before drawing

Or use "d.rast -n ...", which will draw null cells.

-- 
Glynn Clements <glynn at gclements.plus.com>