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MathGroup Archive 1999

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Re: searchforperiod

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19777] Re: searchforperiod
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 17 Sep 1999 01:36:37 -0400
  • Organization: Universitaet Leipzig
  • References: <7rnkao$elp@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Andre,

make an interpolation function, use the interpolation to sample on
equal spaced times t_i and use the Fourier[] method.

Hope that helps
  Jens

> 
> Hello,
> Is Mathematica able to solve the following kind of problem?
> I have computed the time evolution of a certain quantity, say rmod, (the
> details of the physical problem which leads to them are unimportant).
> The results are contained in a list like this :

SNIP SNAPP SNIPP SNAPP

> The classical litterature generally deals with equally spaced abscissas.
> Has somebody heard of a generalized algorithm?
> Of course I could interpolate the function, rmod versus t, but the
> accuracy of the period obtained in that way is ridicoulusly low compared
> to the, say 50 figures, injected in the data. Thanks in advance.


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