Dots in models formulae
On Tue, 16 Aug 2005, Gavin Simpson wrote:
I still can't find this documented for a formula (I found update.formula, but the meaning of "." is different there, slightly, as you indicate) - but it must be as I didn't imagine seeing it - or maybe I did...
It _is_ in `An Introduction to R', both for lm() and update.formula(). Since this meaning does depend on using terms.formula(), it is on that functions' help page.
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