[R-sig-Geo] [Spam]: how to get numerical values of a variogram

[Edzer Pebesma]

 > # gstat:
 > library(gstat)
 > data(meuse)
 > coordinates(meuse)=~x+y
 > v = variogram(zinc~1, meuse, cutoff= 1500, width=100)
 > v$gamma
 [1]  37096.27  72732.59  79850.78 105605.91 117984.59 133647.42 142229.89
 [8] 152057.17 170659.29 159000.66 173061.81 171477.48 159297.84 173958.50
[15] 150212.24
 > # geoR
 > library(geoR)
 > v2 = variog(as.geodata(meuse["zinc"]), breaks = 0:15 * 100)
variog: computing omnidirectional variogram
 > v2$v
 [1]  37096.27  71711.29  80532.62 105605.91 117984.59 133647.42 142229.89
 [8] 152057.17 170659.29 159000.66 173061.81 171477.48 159297.84 173958.50
[15] 150212.24
 > plot(v2$v, v$gamma)

The minor difference seem to be due to point pairs with a distance equal 
to a bin boundary, which are then assigned to different bin:

 > v2$n
 [1]  52 262 382 430 475 503 525 565 535 530 487 483 431 419 427
 > v$np
 [1]  52 263 381 430 475 503 525 565 535 530 487 483 431 419 427
--
Edzer

Pilar Tugores Ferra wrote:
> Hello everybody!
>
> For sure it is very simple, but I can't find the way.
> How could I obtain the numerical values of a experimental semivariogram or variogram? Is it any function that makes this in geoR or gstat (or out of them)?
> Thanks!
> Pilar
>  
>
> Mª Pilar Tugores Ferrà
>
> Becaria FPI - PhD Student
>
> Acústica de Pesquerías
>
> I.E.O. - Centro Oceanográfico de Baleares 
>
> Muelle de Poniente s/n
>
> 07015 Palma de Mallorca (España)
>
> Tel.: (34) 971 401561
>
>
>
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-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster,
Weseler Straße 253, 48151 Münster, Germany.  Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de/