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Re: Fourier analysis of the Data with some gaps [message #66045 is a reply to message #66044]

Mon, 13 April 2009 08:44

Kenneth P. Bowman
Messages: 585
Registered: May 2000

Senior Member

In article
<7cfa22f4-1133-48a1-9562-a84a0d932a6e@i28g2000prd.googlegroups.com>,
"duxiyu@gmail.com" <duxiyu@gmail.com> wrote:

> Dear all,
>
> I want to take FFT on the data.
> But there are some shorts data gaps during this data interval.
> How should I deal with these gaps?
>
> Best regards,
>
> jdu

This is a very general question and there is no unique answer. You
need to be aware of the characteristics of the data.

You can interpolate to fill the gaps. (Many methods.)

You can use least-squares instead of FFT.

You can use various smoothing estimators.

I'm sure others can suggest additional approaches.

Ken Bowman

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[Message index]

		Re: Fourier analysis of the Data with some gaps By: R.G. Stockwell on Tue, 14 April 2009 09:39
		Re: Fourier analysis of the Data with some gaps By: duxiyu@gmail.com on Mon, 13 April 2009 23:37
		Re: Fourier analysis of the Data with some gaps By: R.G. Stockwell on Mon, 13 April 2009 09:10
		Re: Fourier analysis of the Data with some gaps By: Kenneth P. Bowman on Mon, 13 April 2009 08:44
		Re: Fourier analysis of the Data with some gaps By: duxiyu@gmail.com on Wed, 15 April 2009 00:36

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