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

[ronggui]

So it's valid to get logLik (deviance/-2) when the summ argument is unused?

Thank you.

2006/2/22, Prof Brian Ripley <ripley at stats.ox.ac.uk>:
> 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:
>
> Value:
>
>       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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Deparment of Sociology
Fudan University