[R-sig-Geo] Directional variograms with 3D data

[Edzer Pebesma]

This is expected -- tol.vert is ignored because it should be tol.ver
(see docs).

The reason why you don't (can't!) get a warning is that it get absorbed
by the ... , which just passes on things not known (and hence accepts
anything).

On 08/11/2010 06:47 AM, Waichler, Scott R wrote:
> Hello,
> 
> I have a dataset with coordinates in x, y, z.  I would like to generate directional variograms, including ones for distinct horizontal and vertical directions, and fit models to them.  Apparently geoR does not accept 3D coordinates, so I am left with (?) gstat.  I have trouble understanding and applying the 5-parameter version of anis in gstat's vgm(), so I thought I would try generating one direction at a time, as below with a data frame called "han":
> 
> th.vg1 <- variogram(th ~ 1, han, alpha=0, tol.hor = 90, beta=0, tol.vert=30) # within 30 deg of horizontal  
> th.vg2 <- variogram(th ~ 1, han, alpha=0, tol.hor = 90, beta=90, tol.vert=30) # within 30 deg of vertical
> 
> th.vg1 and th.vg2 are identical; both are omnidirectional.  What do I need to do to to get distinct horizontal and vertical directions?
> 
> Scott Waichler
> Pacific Northwest National Laboratory
> P.O. Box 999, Richland, WA  99352
> scott.waichler at pnl.gov
> 509-372-4423, 509-341-4051 (cell)
> 
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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.52north.org/geostatistics      e.pebesma at wwu.de