[R] expanding factor with NA
Prof Brian Ripley
ripley at stats.ox.ac.uk
Mon Oct 27 21:39:12 CET 2003
On Mon, 27 Oct 2003, Liaw, Andy wrote:
> [OK, it's not so strange: na.action is not a documented argument for
> model.matrix, and the call to model.frame in model.matrix.default does not
> have ..., but shouldn't it?]
o, as it documented as for arguments to other methods.
--
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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