[GRASSLIST:4901] Re: converting null values, is this a bug

[Eric G. Miller]

On Thu, Nov 07, 2002 at 01:15:17PM -0000, Thomas Dewez wrote:
> Dear all,
> 
> I am trying to convert null values to 0 with r.mapcalc. Did I bump into a bug?
> 
> rast is a raster containing 1 and null() data, with
> 
> r.mapcalc rast.nonull = "if(rast==null(),0,1)"

Use isnull(). You can't compare null to anything.  But, why not use
r.null ?

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