[R] loess question
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Sat Apr 14 20:42:09 CEST 2001
On Sat, 14 Apr 2001, Edwin Guo wrote:
> I used loess( ) to build a model that has 5 predictors using R of Wndows
> version. And it tells me that there is an unknown error. If I decrease
> the number of predictors, then there will be no error. My questions are:
> 1. Can loess( ) handle more than 4 predictors.
> 2. If it can not, is there any other smoothing regression technique that
> can handle more predictors.
> Any comment will be very helpful to me. Thank you in advance!
Well, possibly you are short of points: you need *many* points in 4D
to do non-parametric smoothing (say billions).
You will need send us an example and the exact output to help you, though!
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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