[R] polynomial fit

[Liaw, Andy]

Or even mars() in the mda package...

Andy

> From: Thomas W Blackwell [mailto:tblackw at umich.edu] 
> 
> Karim  -
> 
> try function  gam()  in package  mgcv.
> 
> library("mgcv")
> help("gam")
> 
> -  tom blackwell  -  u michigan medical school  -  ann arbor  -
> 
> On Mon, 6 Oct 2003, Karim Elsawy wrote:
> 
> > I would like to fit a function H = F(x,y,z) but I do not know the 
> > analytical expression of H, is there a way to get the best 3d 
> > polynomial (in x,y,z) which fits H
> > e.g
> > H<-seq(2,200,len=50)
> > x<-seq(1,50,len=50)
> > y<-seq(50,300,len=50)
> > x<-seq(30,80,len=50)
> >
> > so it is  a sort of fitting a 4 dimensional surface to a 
> regular grid
> >
> > any suggestions are very much appreciated
> > best regards
> > Karim
> 
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