[R] Savitzky-Golay smoothing for reflectance data

[Jesus Frias]

Hi,
	Quote:

	"The Savitzky-Golay smoothing turns out to be exactly equivalent to fitting
data to a polynomial as described" (Skoog, Holler and Nieman, Principles of
Instrumental Analysis, pp 111)

	While R is not a tool for instrumental analysis, I am sure you can find
smoothing methods that will suit your problem in R (there are plenty of
them). There is a thread on this topic on this from March 2003 where Andy
Liaw points to the KernSmooth package.

http://maths.newcastle.edu.au/~rking/R/help/03a/2995.html

all the best,

Jesus

--------------------------------------------------------------
Jesús María Frías Celayeta
School of Food Sci. and Env. Health.
Faculty of Tourism and Food
Dublin Institute of Technology
Cathal Brugha St., Dublin 1. Ireland
Phone: +353 1 4024459 Fax: +353 1 4024495
http://www.dit.ie/DIT/tourismfood/science/staff/frias.html
--------------------------------------------------------------

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Andersson, Henrik
> Sent: 05 February 2004 15:13
> To: r-help at stat.math.ethz.ch
> Subject: [R] Savitzky-Golay smoothing for reflectance data
>
>
> I got a question from a fellow PhD student that work with spectrum
> analysis in Excel and now he has lots of spectrums that needs to be
> smoothed, which would be nice to be able to do in batch.
>
> Is there an R package that can do:
>
> Savitzky-Golay smoothing for reflectance spectral data
>
> or a function that does something similar.
>
> _______________________________________
> Henrik Andersson
> Netherlands Insitute of Ecology
> h.andersson at nioo.knaw.nl
>
> 	[[alternative HTML version deleted]]
>
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