"Francisco Cribari" <cribari at de.ufpe.br> writes:
> Is the following difference between S+ and R normal or is it a bug?
> Thanks. FC.
>
> PS: S+ 4.5 for Windows and R 0.63.1 for Windows.
>
> S-PLUS output:
>
> > inverse.gaussian()$deriv
> > function(mu)
> > -2/mu^3
>
> R output:
>
> > inverse.gaussian()$deriv
> > NULL
This is normal, R doesn't use $deriv in glm families. However,
> inverse.gaussian()$mu.eta
function (eta)
-1/(2 * eta^1.5)
<environment: 0x4059d28c>
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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