On Thu, Nov 14, 2013 at 1:42 PM, Luís Miguel Royo Pérez < [email protected]> wrote:
> Of course! > > here is the command I'm using: > > r.neighbors --overwrite > input=celdas.aleatorias.1-250@PERMANENToutput=media1-250.pesos0 > weight=/home/luismi/Escritorio/prueba_pesos0.txt > > And the Matrix Weight is the next: > > 0 0 0 > 0 0 0 > 0 0 0 > > This matrix is the same for 1, 5 and 10 values. I'm putting spaces between > the numbers... is this correct? > > > Spaces between numbers are OK (and newline for rows). You may want to try the analyze test map created by r.mapcalc: r.mapcalc expression="a_test = row() - 1 + col() - 1" 0 1 2 1 2 3 2 3 4 r.neighbors input=a_test@PERMANENT output=a_neig method=sum weight=... some weights: 1 10 1 10 1 1 1 1 1 method was sum (easy to count by hand), so result: 4 9 24 9 36 63 24 63 90 The center cell is 1*0 + 10*1 + 1*2 + 10*1 + 1*2 + 1*3 + 1*2 + 1*3 + 1*4 = 36 You are right, some example like this should be in the manual. Zero weight really creates NULLs which is strange, I would expect zeros, maybe bug. Hope that helps, if not hopefully others can say something about it. Vaclav 2013/11/14 Vaclav Petras <[email protected]> > >> >> >> On Thu, Nov 14, 2013 at 12:45 PM, Luis Miguel Royo Perez < >> [email protected]> wrote: >> >>> Hi everyone, >>> >>> I hope someone can explain how works the option *"matrix weights" *of >>> the *r.neighbors* program. I've been trying to find out for myself but >>> I'm really confused. I've read the documentation but it's no clear for me >>> in this aspect. >>> >>> What I've trying to do to find out how works it the next: >>> >>> 1st I've created a random matrix 5x5 with values from 1-25 randomly >>> disposed. >>> 2nd I've done four different matrix, 0, 1, 5, 10, for all the values in >>> a 3x3 window, >>> >>> for the first one (0), all the values are NULL. >>> for the rest I have the same result... :S Why? >>> >>> I know i'm missing something, but I don't know what is it. I would >>> aprecciate some help in this point. >>> >>> Hi, can you please post also the exact commands you are using to make it >> clear? (I mean just copy from it command line or using Copy button in >> module dialog.) >> >> Thanks, >> Vaclav >> >> >>> Thank you very much!! >>> >>> -- >>> Luís Miguel Royo Pérez >>> >>> >>> _______________________________________________ >>> grass-user mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/grass-user >>> >> >> > > > -- > Luís Miguel Royo Pérez. > Licenciado en Historia > Arqueólogo colegiado Nº 16218 > > Av. Blasco Ibañez nº 1. Manises (Valencia) > Teléfonos 679846103 y 961545792 > email: [email protected] > web: www.inisig.com > >
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