[R-sig-Geo] plotting directional variograms

[Edzer Pebesma]

Dear Els,

please look at the default value for tol.hor in ?variogram and specify
it in your second call.
--
Edzer

Els Verfaillie wrote:
> Dear list,
>
>  
>
> When plotting directional variograms, I wonder why in the first plot I see a
> different sample variogram for the 45 direction than in the second plot
> (where I only want to plot the 45° variogram). Do I have to define for the
> second plot an angular tolerance that is default for the first plot? 
>
>  
>
> dir.lz <- variogram(log(zinc)~1, data=meuse, alpha=c(0,45,90,135),
> cutoff=1800, width=200)
>
> plot(dir.lz)
>
>  
>
> dir45.lz <- variogram(log(zinc)~1, data=meuse, alpha=c(45), cutoff=1800,
> width=200)
>
> plot(dir45.lz)
>
>  
>
> Thank you for any suggestion.
>
>  
>
>  
>
> ______________________________________________
>
> Dr. Els Verfaillie
>
> Carto-GIS cluster
>
> Ghent University (UGent) - Department of Geography
>
> Krijgslaan 281 - S8  B- 9000 Gent  Belgium
>
> ______________________________________________
>
>
>
>
>
>
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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/
http://www.springer.com/978-0-387-78170-9 e.pebesma at wwu.de