[R] Loess with more than 4 predictors / offsets
Prof Brian Ripley
ripley at stats.ox.ac.uk
Tue Jan 23 08:00:39 CET 2007
On Mon, 22 Jan 2007, Louisell, Paul wrote:
> Does anyone know of an R version of loess that allows more than 4
> predictors and/or allows the specification of offsets? For that matter,
> does anyone know of _any_ version of loess that does either of the
> things I mention?
Why would you want offsets in a regression?: just subtract them from the
lhs. (R's lm has gained offsets by analogy with glm, but the S original
did not have them). If you would be more comfortable working with them,
it would be very easy to create a modified version that supports them.
Also, have you heard of the 'curse of dimensionality'? Localization even
to 4 dimensions is no longer really an appropriate term, and Euclidean
distance will be the main determinant of 'local' and is quite arbitrary.
> Paul Louisell
> ploua at allstate.com
> Research Associate (Statistician)
> Modeling & Data Analytics
> [[alternative HTML version deleted]]
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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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