[R] 4253H twice implementation

[ONKELINX, Thierry]

Have a look at

library(sos)
findFn("twice filter")


ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx at inbo.be
www.inbo.be

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~ Sir Ronald Aylmer Fisher

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~ Roger Brinner

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-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Namens julio cesar oliveira
Verzonden: maandag 22 oktober 2012 12:39
Aan: r-help at r-project.org
Onderwerp: [R] 4253H twice implementation

Dear All,

Anybody know if *4253H twice filter* is implemented in R?

*Description of filter:* Applies a series of running medians of varying window size and a weighted average filter, with re-roughing, to the NDVI time series
*Reference*: Velleman, P. (1980). Definition and comparison of robust nonlinear data smoothing algorithms. Journal of the American Statistical Association..

Thanks
Julio

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