[R] LocFit

Liaw, Andy andy_liaw at merck.com
Mon Mar 6 14:14:05 CET 2006

From: Jacob van Wyk
> I have a question regarding the package LOCFIT of C Loader.
> After fitting a smooth surface (y modeled by two regressors), 
> I can't seem to find a nice way of making a perspective (or 
> other 3d plot). The contours don't look quite so good.
> It is meant to be used as illustration of smoothing to my 
> students in regression analysis.
> Could anybody perhaps assist me in producing a "good" graph 
> in 3d? It probably works in S-Plus, but I am using R.
> (I have tried plot (locfit object, type="persp") on the 
> ethanol dataset
> - but this gives a poor result, with a few warnings.)

Could you elaborate on what `poor result' means?  It doesn't look half bad
to me (except perhaps it needs to be rotated a bit)...


> Jacob
> Jacob L van Wyk
> Department of Statistics
> University of Johannesburg APK
> P O Box 524
> Auckland Park 2006
> South Africa
> Tel: +27-11-489-3080
> Fax: +27-11-489-2832
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