Dear list: R crashes when I specify spatial autocorrelation in nlme: sp3 <- corSpher(c(30,0.75),~x+y|Site, nugget = T) cs3 <- Initialize(sp3, data = sav) sav.nlme1<-nlme(vc.asin ~ SSasymp(canopy, Asym, R0, lrc),data = sav, fixed = Asym + R0 + lrc ~ 1, random = R0 + lrc ~ 1|Site, start = list(fixed = sav.ini), verbose = T, correlation = cs3)
There is a longish (~3 s) pause prior to the crash. There is no crash if "correlation = cs3" is omitted. The nugget effect is large (~0.75), so perhaps it is not worth including, but I would still like to know if the crash can be avoided. My system is: R 2.0.1 Windows XP SP2 Dual Intel Xeon 2.8GHz 2Gb RAM Thanks, Dan Bebber Department of Plant Sciences University of Oxford UK ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html