R help - Oct 2011 - Fitting a Harmonic Function to Time Series Data

Dear All,

I have some time series data where X=month and Y=nutrient concentration (I
can have several concentration data for one month). Is there a way to fit
for it an Harmonic Function. Is there a package, script,etc which I can use?

Thx
 


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On 14/10/2011 1:00 a.m., ashz wrote:
> Dear All,
>
> I have some time series data where X=month and Y=nutrient concentration (I
> can have several concentration data for one month). Is there a way to fit
> for it an Harmonic Function. Is there a package, script,etc which I can
use?
>
> Thx
>
>
Possibly there is this functionality in Rob Hyndman's forecast package. 
See this post by him:
http://robjhyndman.com/researchtips/longseasonality/
which has some code which should also be of use.

David Scott


_________________________________________________________________
David Scott	Department of Statistics
		The University of Auckland, PB 92019
		Auckland 1142,    NEW ZEALAND
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Email:	d.scott at auckland.ac.nz,  Fax: +64 9 373 7018