[R] Type III Sum of Squares
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Fri Mar 1 16:49:18 CET 2002
On Fri, 1 Mar 2002, [iso-8859-1] Sébastien Plante wrote:
> When doing a two-ways anova in R and comparing my same results with an SPSS
> output, I noticed that R calculated type I Sum of Squares. Is it possible to
> use Type III Sum of Squares?
Yes, but we don't tell you how to avoid leading you into a mire. See
Most of the time drop1() does what people are using `Type III' for.
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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