Sorry...
I am using s-Plus 2000 and have the MASS version 6.1...should I update to 7.1 ?
Achaz von Hardenberg
Scrive Prof Brian Ripley <ripley@stats.ox.ac.uk>:
> On Thu, 11 Nov 2004, Achaz Graf Von Hardenberg wrote:
>
> > Hi,
> > I would like to obtain the variance-covariance matrix for an lme object and
> > terefore tried the following:
> >
> > >library(MASS)
> > >x<- vcov(myobject.lme)
> >
> > however, I get the following error message:
> >
> > Error in UseMethod("vcov"): no specific or default method found
> >
> > What am I doing wrong?
>
> Not telling us the version of S-PLUS and of MASS for a start.
> Here is an example from S-PLUS 6.2 and the current MASS version 7.1pl021
>
> > fm1 <- lme(distance ~ age, data=Orthodont) # random is ~ age
> > vcov(fm1)
> (Intercept) age
> (Intercept) 0.60100669 -0.046850866
> age -0.04685087 0.005077029
>
> --
> Brian D. Ripley, ripley@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 272860 (secr)
> Oxford OX1 3TG, UK Fax: +44 1865 272595
>
>
>
|