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
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