Iteratively Reweighted Generalized Least Squares IRWGLS
Faye Anderson wrote:
Hi All, I think sgeostat function fit.variogram does it.
No, it does not quantify the correlations between variogram estimates, so you'd better forget about the "Generalized" -- just look at the output of variogram() that it reads; also the reweighting is only used when you ask for it; it's a rather problematic feature IMO, as you'd change the definition of the thing you optimize while you're optimizing it... In your original question you forgot to mention that you meant IRWGLS for variogram model fitting. -- Edzer
Thanks. Faye
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Edzer Pebesma Institute for Geoinformatics (ifgi), University of M?nster Weseler Stra?e 253, 48151 M?nster, 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