On Tue, 8 Feb 2000, Pete Hurd wrote:
> How to Ancova in R?
>
> I know this has got to be an FAQ, because I see it asked in the lists, but
> I haven't seen an answer to it.
That's what the aov() function does, if I understand you correctly, and it
is itself a wrapper for calls to lm. ancova normally means just the
analysis of variance for some simple regression models. The S language has
an elegant formula notation for regression models rather than a whole set
of special-purpose procedures.
> I see the R-sm has the ancova thing happening, but I kind of doubt that
> what I'm trying to do is "smoothing"...
And what is R-sm? An obscure reference to the sm package on CRAN,
perhaps? There is a function sm.ancova in that package, and that compares
a set of nonparametric regression curves.
--
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 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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