[R] Nonlinear PCA function

[Frank E Harrell Jr]

On Thu, 17 Oct 2002 16:20:51 -0700
Jan de Leeuw <deleeuw at stat.ucla.edu> wrote:

> ftp://gifi.stat.ucla.edu/pub/homalsR.tar.gz
> 
> but since nonlinear PCA can de defined in various ways,
> you may have something different in mind
> 
> --- Jan
> 
> On Thursday, Oct 17, 2002, at 13:56 US/Pacific, Feng Zhang wrote:
> 
> > Hey, all
> >
> > Do you know if there are some Nonlinear PCA algorithm
> > or functions provided by R package?
> >
> > Now I am working on this and want to see if somebody already did this  
> > by R
> > language.
> >
> > Thanks a lot.
> >
> > Fred

The transcan function in the Hmisc package does nonlinear PCs, or at least it derives the nonlinear transformations you can feed into prcomp or other functions.  See http://hesweb1.med.virginia.edu/biostat/s/Hmisc.html and a case study in my book Regression Modeling Strategies (Springer, 2001).
-- 
Frank E Harrell Jr              Prof. of Biostatistics & Statistics
Div. of Biostatistics & Epidem. Dept. of Health Evaluation Sciences
U. Virginia School of Medicine  http://hesweb1.med.virginia.edu/biostat
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._