Does the ?logLik? function applied to a ?glm? and ?glm.nb? (from MASS package) calculate the complete log-likelihoods, or does it drop the constant terms of the equation? (It?s not clear from the associated help pages, and I?ve found no reference from searching the R help mailing list) Thank you, Kelly Young
logLik calculations
2 messages · kyoung, Bill Venables
library(MASS)
methods("logLik")
[1] logLik.Arima* logLik.fitdistr* logLik.gam logLik.glm* [5] logLik.glmmPQL* logLik.lm* logLik.negbin* logLik.nls* [9] logLik.polr* Non-visible functions are asterisked
glm generates an object of class "glm", so tick! glm.nb generates an object of class ... "negbin", so tick! Because the methods are starred, though, they will not be directly accessible. (I am to blame for choosing class name "negbin" for objects generated by glm.nb, but it's far too late to do anything about it now!) Bill Venables. -----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of kyoung Sent: Friday, 21 March 2008 2:53 AM To: r-help at r-project.org Subject: [R] logLik calculations Does the "logLik" function applied to a "glm" and "glm.nb" (from MASS package) calculate the complete log-likelihoods, or does it drop the constant terms of the equation? (It's not clear from the associated help pages, and I've found no reference from searching the R help mailing list) Thank you, Kelly Young ______________________________________________ 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.