[R] dropterm in a function

[Thomas Lumley]

On Fri, 4 Oct 2002, [iso-8859-1] Göran Broström wrote:

> On Fri, 4 Oct 2002, Thomas Lumley wrote:
>
> > On Fri, 4 Oct 2002, [iso-8859-1] Göran Broström wrote:
> >
> > >
> > > I'm trying to use 'dropterm' (from MASS) in a function along the lines
> > >
> > > run <- function(dat){
> > >   fit <- (something)(Y ~ (something), data = dat)
> > >   lr <- dropterm(fit, test = "Chisq")
> > >   return(fit, lr)
> > > }
> > >
> > > but running 'run' I get (those scoping rules again...?)
> > >
> > > Error in terms.formula(formula, special, data = data) :
> > >         Object "dat" not found
> > >
> > > This works fine at the command line. Can I send 'dat' to 'dropterm'
> > > somehow, or what should I do?
> > >
> >
> > What is "something"? If "something" is lm or glm this works for me. I
> > would expect it not to work for lme().
>
> It is 'coxph'. So I shouldn't expect it to work? A pity, because it is a
> nice feature. Thanks,
>

No, you should expect it to work, I just know that it doesn't. It needs
fixing.


	-thomas


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