[EMAIL PROTECTED] wrote: > Full_Name: Hendrik Weisser > Version: 2.6.1 > OS: Linux > Submission from: (NULL) (139.19.102.218) > > > The following computation never finishes and locks R up: > > >> values <- list(x=10:30, y=c(23.85, 28.805, 28.195, 26.23, 25.005, 20.475, >> > 17.33, 14.97, 11.765, 8.857, 5.3725, 5.16, 4.2105, 2.929, 2.174, 1.25, 1.0255, > 0.612, 0.556, 0.4025, 0.173)) > >> y.max <- max(values$y) >> model <- nls(y ~ SSlogis(x, asym, xmid, scal), data=values, algorithm="port", >> > start=c(asym=y.max, xmid=15, scal=-0.5), upper=c(y.max, Inf, Inf)) > > This used to work with R version 2.5.1 patched. > The problem does _not_ occur if the parameter "scal=-0.5" in the nls call is > changed, e. g. to "scal=-0.6" or "scal=-0.4". > Simply calling "model <- nls(y ~ SSlogis(x, asym, xmid, scal), data=values)" > also works, but this does not use the upper bound for the asym parameter, > which > was the point. > > "Linux" is not a good enough description of your platform.
This works fine on SUSE 10.2/x86_64. -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
