[R] ms?

[Douglas Bates]

gb at stat.umu.se writes:

> Is the Splus (4.0) function  ms  (or something equivalent)
> available in some  R  package? I am trying to get an Splus
> program to work with R. The piece of  Splus  code is
> 
> ms.fit<-ms(~t(Y-(X[,1] * alf + X[,2] * bet)^delta)%*%
>            covariance.matrix.inverse%*%
>            (Y-(X[,1] * alf + X[,2] * bet)^delta),
>            sys.parent(0) , list(alf=5,bet=0.5), trace = F)

There are several different optimizers available in R now but none of
them are exactly the same as the ms optimizer in S.  The nlm
optimizer has been available for a long time.  Recently Brian Ripley
added a variety of optimizers in the optim function.  Try
 ?optim
and
 ?nlm
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