[R-sig-Geo] indicator simple kriging with varying local mean on gstat

Edzer Pebesma edzer.pebesma at uni-muenster.de
Sun May 10 22:41:34 CEST 2009


The simplest solution might be to just (simple) krige the residuals, and
add them to your known varying mean.

Please be aware that this "model" suggests residuals have mean-dependent
variance (p * (1-p)), and thus using a single variogram model for the
full set of residuals is not in accordance with theory.

I guess that this problem is larger than the one you mention --
covariances are simply derived from variograms that reach a sill by C(h)
= gamma(inf) - gamma(h).
--
Edzer

facrimas at libero.it wrote:
> Dear guys,
>
> I want to use the indicator simple kriging with varying local mean on gstat.
>
> Do you have a script example about it?
>
> I do not understand which is the local mean that I have to put in the command 
> of simple indicator kriging.....
>
>  I do not also well understand whether if it is posssible to use the 
> semivariogram model in SK, because theory tells that it need the covariance 
> function.......
>
> Any suggest?
>
> Thank you.
>
> Cristiano
>
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