[R] Two repeated warnings when runing gam(mgcv) to analyze my dataset?

From: zhijie zhang <epistat_at_gmail.com>
Date: Fri, 14 Dec 2007 01:46:03 +0800

Dear all,
 I run the GAMs (generalized additive models) in gam(mgcv) using the following codes.


 And two repeated warnings appeared.
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

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.

With Kind Regards,


::\_)::(..):: :::::::)./::: ::::::(_/:::: ::::::::::::: [***********************************************************************] Zhi Jie,Zhang ,PHD Tel:+86-21-54237149 Dept. of Epidemiology,School of Public Health,Fudan University Address:No. 138 Yi Xue Yuan Road,Shanghai,China Postcode:200032 Email:epistat_at_gmail.com Website: www.statABC.com [***********************************************************************] oooO::::::::: (..):::::::::
::\_)::(..):: :::::::)./::: ::::::(_/:::: ::::::::::::: [[alternative HTML version deleted]] ______________________________________________ R-help_at_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.
Received on Thu 13 Dec 2007 - 17:49:47 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Mon 17 Dec 2007 - 10:30:19 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.