[R] iterative reweighting in LOESS function

2003-03-14 Thread Philippe Hupé
Hello,

Is there an iterative reweighting option in LOESS function from modreg 
package to perform robust fitting in the presence of outliers in the data ?

Thanks in advance.

Philippe.

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Re: [R] iterative reweighting in LOESS function

2003-03-14 Thread ripley
On Fri, 14 Mar 2003, Philippe Hupé wrote:

 Is there an iterative reweighting option in LOESS function from modreg 
 package to perform robust fitting in the presence of outliers in the data ?

See the help page, the reference on the help page and the source code.

I guess the answer is `not quite as you describe', but there are
precise statements in the resources of my previous paragraph.  Did you 
check the help page?

-- 
Brian D. Ripley,  [EMAIL PROTECTED]
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel:  +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UKFax:  +44 1865 272595

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Re: [R] iterative reweighting in LOESS function

2003-03-14 Thread ripley
On Fri, 14 Mar 2003, Philippe Hupé wrote:

 I have just found the answer : iterative reweighting can be set through 
 loess.control function via iterations option.

No so: it's through the family argument to loess: `iterations' sets how
many iterations *when* robust fitting is selected.

This is both on the help page and in the reference there.

-- 
Brian D. Ripley,  [EMAIL PROTECTED]
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel:  +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UKFax:  +44 1865 272595

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