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Re: very fast spline interp function for heavy oversampling? [message #20382 is a reply to message #20377]

Wed, 21 June 2000 00:00

pit
Messages: 92
Registered: January 1996

Member

In article <7nS35.70$482.44454@den-news1.rmi.net>,
"R.G. Stockwell" <stockwell@co-ra.comremove> writes:
> Greetings,
>
> I have a situation where I take a time series, and need to interpolate the
> function to many more samples.
> i.e. original time index = [1,2,3,4....10]
> and I need samples at new time index =
> [1.000,1.001,1.002.......9.999,10.000].

You could try fourier interpolation by zero padding, i.e. calculating
the FFT and insert zeroes (remember the ordering inthe fft!) for the
high frequency terms, then transform it back.

Peter

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~
Dr. Peter "Pit" Suetterlin http://www.astro.uu.nl/~suetter
Sterrenkundig Instituut Utrecht
Tel.: +31 (0)30 253 5225 P.Suetterlin@astro.uu.nl
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[Message index]

		Re: very fast spline interp function for heavy oversampling? By: R.G. Stockwell on Wed, 21 June 2000 00:00
		Re: very fast spline interp function for heavy oversampling? By: Craig Markwardt on Wed, 21 June 2000 00:00
		Re: very fast spline interp function for heavy oversampling? By: pit on Wed, 21 June 2000 00:00
		Re: very fast spline interp function for heavy oversampling? By: Martin Schultz on Wed, 21 June 2000 00:00

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