Douglas Bates: > It may seem "obvious" how to define the multiple correlation > coefficient R^2 for a non-linear regression model but it's not.
A couple of articles explaining why, that may be of interest: Anderson-Sprecher R. (1994). ‘Model comparisons and R²’. The American Statistician, volume 48, no. 2, pages 113–117. http://dx.doi.org/10.2307/2684259 Kvålseth T.O. (1985). ‘Cautionary note about R²’. The American Statistician, volume 39, no. 4, pages 279–285. http://dx.doi.org/10.2307/2683704 -- Karl Ove Hufthammer ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.
