Re: Harmonic analysis

[Gabriel Clauzet <gclauzet@xxxxxx>]

Hi all,

I'm using this script to calculate the power spectrum of time series wich
work quite well.
I would like to compute the confidence interval with the spectrum. Does
anybody know if it is possible using ferret ?

Thanks in advance.

Regards,
Gabriel


----- Original Message -----
From: "Ansley Manke" <Ansley.B.Manke@noaa.gov>
To: <kvram55@yahoo.com>
Cc: "Ansley Manke" <ansley@pmel.noaa.gov>;
<ferret_users@ferret.wrc.noaa.gov>
Sent: Friday, March 28, 2003 6:13 PM
Subject: Re: Harmonic analysis


> Hi Ramesh,
> Ferret has a  family of FFT functions; see the demo
> ef_fft_demo.jnl for a simple example of their use
>
> http://www.ferret.noaa.gov/Ferret/Demos/ef_fft_demo/ef_fft_demo.html
>
> In the Users Guide, under FFTA, there is a discussion of the
> method that the functions use.  Note that in addition to the FFT
> amplitude and phase that are used in the demo, there are also
> functions to return the real and imaginary part of the transformation,
> and to invert the Fourier transform.   If you develop Ferret scripts
> to use these functions for your analysis, they would be welcome
> contributions to the Ferret community.
>
> Ansley Manke
>
> "K.V. Ramesh" wrote:
>
> >  Dear Ferret users,
> >    Is it possible to perform harmonic analysis using ferret,
> > to find different hormonics from daily data. If so How can
> > I do it. Can any body can help me.
> >
> > Thanks in advance.
> >
> > regards,
> > Ramesh
> >
> > __________________________________________________
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>
> --
> Ansley Manke  Pacific Marine Environmental Laboratory  Seattle WA
(206)526-6246
>
>
>
>