[GRASSLIST:157] Re: r.statistics/r.mapcalc returns nan values

[Martin Rutzinger]

i tried r.nulls and r.mapcalc "erg=if(isnull(rast1),0,rast1)" which should be
the same. but that did not help.

i'll keep searching
m

Zitat von Hamish <hamish_nospam at yahoo.com>:

> > i tried to reclass the null values in the cover map to 0 - but this
> > did not help.
>
> no help with the bug, but did you try r.null?
>
>
> Hamish
>


Zitat von Martin Rutzinger <Martin.Rutzinger at uibk.ac.at>:

> hi list!
>
> i use r.statistics to calculate the stddev for areas in my base layer (input
> is
> cover layer). r.statistics returns an output raster containing ids as cat
> value
> and the stddev for each area as lables.
>
> r.statistics base=areas_rast cover=input_rast method=stddev
> output=stddev_area
>
> if i try to convert the lables to cat all "areas" are empty (="nan" values).
>
> r.mapcalc "final_rast=@stddev_area"
>
> my cover map contains some regions with null values but they are not covered
> by
> an area of the base layer. if i zoom in so that there are no null values
> within
> my region. it works fine.
>
> i tried to reclass the null values in the cover map to 0 - but this did not
> help.
>
> had anybody similar problems with r.statistics/r.mapcalc - any suggestions?
> thanks for discussing and helping
> martin
>
>
>
>