What mgcv version are you running (and on what platform)? n Thursday 13 December 2007 17:46, zhijie zhang wrote: > Dear all, > I run the GAMs (generalized additive models) in gam(mgcv) using the > following codes. > > m.gam > <-gam(mark~s(x)+s(y)+s(lstday2004)+s(ndvi2004)+s(slope)+s(elevation)+disbin >ary,family=binomial(logit),data=point) > > And two repeated warnings appeared. > Warnings: > 1: In gam.fit(G, family = G$family, control = control, gamma = gamma, ... > : Algorithm did not converge > > 2: In gam.fit(G, family = G$family, control = control, gamma = gamma, ... > : fitted probabilities numerically 0 or 1 occurred > > Q1: For warning1, could it be solved by changing the value of > mgcv.toloptions for > gam.control(mgcv.tol=1e-7)? > > Q1: For warning2, is there any impact for the results if the "fitted > probabilities numerically 0 or 1 occurred" ? How can i solve it? > > I didn't try the possible solutions for them, because it took such a > longer time to run the whole programs. > Could anybody suggest their solutions? > Any help or suggestions are greatly appreciated. > Thanks.
-- > Simon Wood, Mathematical Sciences, University of Bath, Bath, BA2 7AY UK > +44 1225 386603 www.maths.bath.ac.uk/~sw283 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.