R help - Feb 2006 - Prediction method for lowess,loess,lokerns,lpepa,ksmooth

Hi Every Body,
  I don't know why some regression functions have no related prediction 
function. For example lowess, loess, lokerns, lpridge, lpepa, and  ksmooth.
  What could help? Is there any global or wrapper function so that can help?
  Regards,
  Amir Safari
  
			
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On Tue, 2006-02-07 at 06:24 -0800, Amir Safari wrote:
>   
>   Hi Every Body,
>   I don't know why some regression functions have no related
> prediction  function. For example lowess, loess, lokerns, lpridge,
> lpepa, and  ksmooth.
>   What could help? Is there any global or wrapper function so that can
> help?
>   Regards,
>   Amir Safari
loess() /does/ have a predict method [7]:
> methods("predict")
 [1] predict.ar*                predict.Arima*
 [3] predict.arima0*            predict.glm
 [5] predict.HoltWinters*       predict.lm
 [7] predict.loess*             predict.mlm
 [9] predict.nls*               predict.poly
[11] predict.ppr*               predict.prcomp*
[13] predict.princomp*          predict.smooth.spline*
[15] predict.smooth.spline.fit* predict.StructTS*

   Non-visible functions are asterisked

The other functions (except ksmooth) I can't find in base R 2.2.1-
patched, so they are likely from contributed packages. As such, you
should contact the package maintainers for help, to make a feature
request, or offer your help in writing predict methods for these
functions.

?ksmooth states:

Note:

     This function is implemented purely for compatibility with S,
     although it is nowhere near as slow as the S function. Better
     kernel smoothers are available in other packages.

So perhaps you could look in the contributed packages section of the
CRAN website for something that meets your needs?

HTH

G
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Gavin Simpson                     [T] +44 (0)20 7679 5522
ENSIS Research Fellow             [F] +44 (0)20 7679 7565
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Amir Safari wrote:
>   
>   Hi Every Body,
>   I don't know why some regression functions have no related prediction
function. For example lowess, loess, lokerns, lpridge, lpepa, and  ksmooth.
>   What could help? Is there any global or wrapper function so that can
help?
>   Regards,
>   Amir Safari
>   
> 			
> ---------------------------------
> 
> 	[[alternative HTML version deleted]]
> 
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http://www.R-project.org/posting-guide.html
> 
This is somewhat related to what you want.  In the Hmisc package look at 
the areg.boot function.

-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University