Dear Anna, What is your goal in obtaining a value for R^2 ? I believe it is not provided for a non-linear model, because it does not make much sense. It certainly will not have the same interpretation as in a linear model, and all the ways it *could* be "defined" come with their own sets of problems. A more precise definition of what you want (say you have a particular formula but do not know how to get the necessary information out of the model) may get a better answer.
Best regards, Josh On Wed, Mar 16, 2011 at 9:53 AM, Anna Gretschel <ana-...@web.de> wrote: > Dear List, > > how can I obtain the value of r suqared for a non-linear model? For > linear models it can be found in the summary() of the model but for > non-linear models I just don't know. Please help! > > Anna > > ______________________________________________ > 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. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ 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.
