[R] need help with smooth.spline

[Liaw, Andy]

1.  It may not be the thing to do, but if you really want to, try:
   install.packages(CRAN.packages()[,1], lib.loc=...)

2.  No.  Some packages have vignettes, but most not.  Any additional info
should have been cited in the `Reference' section of the help page.

Cheers,
Andy

> From: thacker at aoml.noaa.gov [mailto:thacker at aoml.noaa.gov] 
> 
> "Liaw, Andy" wrote:
> > 
> > I looked at rqss() in nprq, as Prof. Koenker suggested, but 
> that doesn't
> > have a predict() method, so I don't know how you'd get the 
> smooth at values
> > other than the observed...
> > 
> > The criteria (CV, GCV, etc.) could have multiple local 
> minima for some data,
> > as Prof. Ripley and Prof. Koenker pointed out, so relying on those
> > `automatic' selection procedure may not be the best thing to do.
> > Theoretically as spar (lambda) goes to 0, smooth.spline 
> should linearly
> > interpolate the data.  I guess the routine could run into 
> numerical problems
> > before that.
> > 
> > Here's yet another thing to try (thanks to Martin for the 
> `lokern' package):
> > 
> > library(lokerns)
> > par(mfrow=c(2,4))
> > for (i in 1:4) {
> >   plot(dat[[i]]$p, dat[[i]]$t);
> >   lines(lokerns(dat[[i]]$p, dat[[i]]$t, x.out=seq(25,1000,25)))
> >   plot(dat[[i]]$p, dat[[i]]$s)
> >   lines(lokerns(dat[[i]]$p, dat[[i]]$s, x.out=seq(25,1000,25)))
> > }
> > 
> > Best,
> > Andy
> 
> Thanks for still another suggestion.  I'm keeping our system manager
> busy loading packages.  Is there a way he can get them all at once?
> 
> Also, do you know whether any of these packages come with a manual ---
> other than the help pages?
> 
> Regards,
> 
> Carlisle
> 
> 


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