[R] model constant relations

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Nov 11 08:27:10 CET 2003

On Mon, 10 Nov 2003, Spencer Graves wrote:

> Thanks very much:  I typed "?summary.fit" when I meant to type 
> "?summary.lm", which explains why I didn't find the "cor" argument.  
> Thanks also for the reference to "?vcov".  I didn't see that in the "see 
> also" section for either "lm" or "summary" or "summary.lm".  Might it be 
> worth added? 

It's just one of a whole bunch of generic extractors, which are usually 
not mentioned.  It was lifted from MASS, and is documented there.

> >>      In S-Plus, this is automatically produced by summary(lm(...)).  
> >>There is probably a simple, elegant way to get this in R, but I don't 
> >>know it.  Therefore, I produced it as follows: 
> >
> >summary(fit, cor=TRUE) : the default is different between R and S 
> >(intentionally).
> >
> >See also ?vcov.

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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