... and I would further add to David's comments that R^2 is basically nonsense for glm's (and mostly for lm's also -- but not a topic for further discussion here). Likelihood ratio tests are what should be used to judge model fits for glm's -- also not a topic for further discussion here. Consult a local statistician, do your glm homework, or post on stats.stackexchange.com for statistical follow-ups.
Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll On Sat, Nov 15, 2014 at 9:00 PM, David Winsemius <dwinsem...@comcast.net> wrote: > >> On Nov 15, 2014, at 7:19 AM, Aravindhan, K <k-aravindh...@ti.com> wrote: >> >> Hi David, >> I am using generalized linear models (glm command with family="poisson"). > > You still have not answered what sort of pseudo-R^2 measure you expected. > > http://www.econ.ucdavis.edu/faculty/cameron/research/jbes96preprint.pdf > > — > David. >> >> Thanks >> Aravindhan >> >> -----Original Message----- >> From: David Winsemius [mailto:dwinsem...@comcast.net] >> Sent: Saturday, November 15, 2014 1:16 PM >> To: Aravindhan, K >> Cc: R-help@r-project.org >> Subject: Re: [R] how to compure R-squared in glm >> >> >>> On Nov 14, 2014, at 5:48 PM, Aravindhan, K <k-aravindh...@ti.com> wrote: >>> >>> Team, >>> Can some one help me in computing the R-squared value in glm. >>> >> >> Which version of a pseudo-R^2? What’s the model? >> >> >>> Thanks >>> Aravindhan >>> >>> [[alternative HTML version deleted]] >> >> This is a plain text mailing list >> >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >> >> Please: >> >>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >> >> David Winsemius, MD >> Alameda, CA, USA >> > > David Winsemius, MD > Alameda, CA, USA > > ______________________________________________ > 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. ______________________________________________ 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.