On Fri, 24 Jan 2003, Kazuki Miyamoto wrote: > Dear All, > > Is it possible to apply "log" link to gaussian family in glm? > > Help file saids that the gaussian family has only one permissible link, > "identity". Similar descriptions are also in "Modern Applied Statistics with > S-plus".
Well, no choice of link is allowed in S-PLUS (sic), the subject of the book you mention. The R help file for gaussian() is wrong, and I will correct it. "inverse", "log" and "identity" links are allowed in the R code. This has been so since the current CVS file started in March 1998. > But the application of log link to gaussian family seems to be valid > in R. Note that it is quite possible for no MLE to exist in that case, so use with care: the symptom will be convergence problems, but they can occur even if there is a valid solution. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
