Thank you very much. However I found no couterpart for that in cokriging. Is there any way to do that manually? I mean to get "m" manually?
On Mon, Mar 1, 2010 at 8:26 PM, Edzer Pebesma <[email protected] > wrote: > Ebrahim Jahanshiri wrote: > >> I am wondering if there is any function or option to back-transform the >> result of the lognormal kriging in gstat yet. >> >> > You can use krigeTg, which does trans-Gaussian kriging for all Box-Cox > transforms; passing it a lambda parameter with value 0, log-normal kriging > is used. Pls look at the examples, the back-transformed values have funny > names like var1TG.pred. > > The whole think has been implemented for ordinary kriging only; if someone > can point me out a source that describes how to do this for universal / > external drift kriging, I'd be happy to look into how to implement it. > >> Although for simple kriging it is fairly straight forward, that is, it is >> >> possible to do back-transform using the vector of predicted values and >> kriging variances, but for ordinary kriging, it might be difficult because >> we dont have lagrange multiplier (according to my web help search) to do >> the >> back-transformation. I am wondering if there has been any advancement in >> that matter? >> >> thank you >> >> [[alternative HTML version deleted]] >> >> _______________________________________________ >> R-sig-Geo mailing list >> [email protected] >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >> >> > > -- > 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 > [email protected] > > [[alternative HTML version deleted]]
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