R help - Aug 2008 - Best way to select good points in a noisy signal ?

Hello, 

When I plot y=f(x) from the file xy.txt (
http://www.nabble.com/file/p18773387/xy.txt xy.txt ), I can clearly see a
trend.
Is there a function or a package able to take the median value of y for an
interval of x (x +/-  a defined value) to plot nice graph (at least a better
one) ?

Thanks in advance,
Have a nice week-end,
Ptit Bleu.

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I'm not quite sure if this is what you mean  but have a look at ?lowess or
?smooth.  I think you might get want you want if you play around with the
parameters in lowess


--- On Fri, 8/1/08, Ptit_Bleu <ptit_bleu at yahoo.fr> wrote:
> From: Ptit_Bleu <ptit_bleu at yahoo.fr>
> Subject: [R]  Best way to select good points in a noisy signal ?
> To: r-help at r-project.org
> Received: Friday, August 1, 2008, 8:28 AM
> Hello, 
> 
> When I plot y=f(x) from the file xy.txt (
> http://www.nabble.com/file/p18773387/xy.txt xy.txt ), I can
> clearly see a
> trend.
> Is there a function or a package able to take the median
> value of y for an
> interval of x (x +/-  a defined value) to plot nice graph
> (at least a better
> one) ?
> 
> Thanks in advance,
> Have a nice week-end,
> Ptit Bleu.
> 
> -- 
> View this message in context:
>
http://www.nabble.com/Best-way-to-select-good-points-in-a-noisy-signal---tp18773387p18773387.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained,
> reproducible code.

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