[R] spectral analysis of time series

[Gavin Simpson]

On Thu, 2006-10-19 at 11:59 +0200, Thomas Hoffmann wrote:
> Dear List-Members,
> 
> I would like to draw the amplitudes of different frequencies from a time 
> series as shown in the attached figure. Does anybody has an idea how to 
> do it?
> 
> 
> Best wishes
> Thomas

Thomas,

If your data are really like those (Foram derived \delta^{18}O
measurements?) palaeoceanographic data and are irregular in time, then
the nuSpectral package may be useful. It isn't on CRAN, but the files
and a paper in JSS about the package are available here:

http://www.jstatsoft.org/index.php?vol=11

HTH

G

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