[GRASS-user] r.mfilter produces empty result

[Markus Neteler]

Hi Luís,

On Thu, May 11, 2017 at 9:36 AM, Luí­s Moreira de Sousa
<luis.de.sousa at protonmail.ch> wrote:
> Dear all,
>
> I am trying to apply a high pass filter to a raster; following Markus
> Neteler's book I created a simple high-pass filter:
>
>> cat highpass9.txt
> TITLE 3x3 High Pass
> MATRIX 3
> -1 -1 -1
> -1  8 -1
> -1 -1 -1
> DIVISOR 9
> TYPE S

In the book (3rd edition, p 309) we wrote

TYPE P  (not S).

Maybe that helps?
Markus


-- 
Markus Neteler, PhD
http://www.mundialis.de - free data with free software
http://grass.osgeo.org
http://courses.neteler.org/blog