comp.lang.idl-pvwave archive: archive » Re: Fourier analysis of the Data with some gaps

Home » Public Forums » archive » Re: Fourier analysis of the Data with some gaps

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

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

Report message to a moderator

[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

Previous Topic:	DEM from geoeye pan data
Next Topic:	i found some bugs with the idlffdxf object

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 29 08:03:15 PDT 2025

Total time taken to generate the page: 3.59818 seconds