[R-sig-Geo] GLS spatial model-- range error

[Edzer Pebesma]

I don't I think the authors of nlme are on this list, but I looked at 
the help of corExp, and that suggests that using the argument

correlation = corExp(form = ~x+y)

will be more useful that what you did.
--
Edzer

jofre carnicer cols wrote:
> Hello,
>
> I am computing a gls spatial model:
>
> require(nlme)
>
> gls.exp<-gls(S1 ~ X2TPall + tmngem + tmaxjlm + arbdenkm + prat_herm + 
>     arbclakm + conreukm, data=snouter.df, correlation=corExp(form~X+Y), na.action=na.omit)
>
> and obtain the following error:
>
> Error en Initialize.corSpatial(X[[1L]], ...) : 
>   Range must be > 0 in "corSpatial" initial value
>
> I have checked CorExp, gls, and CorClasses help but couldn't find how to solve this error. Any help is welcome.
>
> Many thanks in advance,
>
> Jofre
>
>
>
>
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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