[R] does multinomial logistic model from multinom (nnet) has logLik?

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Feb 22 14:53:53 CET 2006

On Wed, 22 Feb 2006, ronggui wrote:

> I want to get the logLik to calculate McFadden.R2 ,ML.R2 and
> Cragg.Uhler.R2, but the value from multinom does not have logLik.So my
> quetion is : is logLik meaningful to multinomial logistic model from
> multinom?If it does, how can I get it?

>From the help page:


      A 'nnet' object with additional components:

deviance: the residual deviance.

So it has a residual deviance.  That is -2 log Lik in many cases (but not 
if the argument 'summ' is used)

> Thank you!
> ps: I konw  VGAM has function to get the multinomial logistic model
> with  logLik,  but I prefer use the function from "official" R
> packages .
> --
> ronggui
> Deparment of Sociology
> Fudan University

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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