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- Newsgroups: sci.fractals
- Path: sparky!uunet!pipex!warwick!bham!ibm3090.bham.ac.uk!LANDINIG
- From: Gabriel Landini <g.landini@uk.ac.bham>
- Subject: Re: Interpolation & Chaotic TS
- Sender: usenet@rs6000.bham.ac.uk (USENET News Service)
- Message-ID: <920705170751@ibm3090.bham.ac.uk>
- Date: Thu, 5 Nov 1992 17:07:51 GMT
- References: <!7h13=#@rpi.edu>
- Organization: The University of Birmingham, United Kingdom
- Lines: 30
-
- >
- > Given a chaotic time series with a fractal dimension, does anyone know of
- > any theory or whatever which relates splines to the interpolation of the
- > chaotic time series corresponding to the given fractal dimension? For
- > example, if I have a signal that can be best interpolated by cubic splines,
- > then that is what I would use (using a linear or quadratic spline would not
- > do so well). Now, given a chaotic time series (perhaps one similar to that
- > of Brownian motion), it would seem that you cannot interpolate it with any
- > spline of some order, or you need a very high order spline in order to
- > interpolate it accurately. This may sound crazy, but would it be that you
- > would need a spline of some fractional order (in relation to the fractal
- > dimension of the time series) in order to do an accurate interpolation? Or,
- > would the spline needed have to have fractal properties itself (a fractal
- > interpolating a fractal, so to speak. I got this idea from Barnsley's IFS
- > where a base fractal is used to interpolate a fractal image).
- >
- > If anyone can give me any guidance at all on this problem, I would greatly
- > appreciate it. Also, any reference to literature that may help me would
- > be nice.
- >
- > John
- >
- >------------------------------------------------------------------------------
-
- If your time series is chaotic, then your spline will be always in some way
- "wrong". What is the point of getting a spline, then?
- Do you have any other example?
- How do you know that your time series is chaotic?
-
- Gabriel
-