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MathGroup Archive 2006

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Re: Find a function that fits two dimensional data

  • To: mathgroup at smc.vnet.net
  • Subject: [mg67282] Re: Find a function that fits two dimensional data
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Thu, 15 Jun 2006 03:26:46 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <e6op8s$s2m$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Raj wrote:
> hi!
> 
> Could somebody help me find a function that fits some two dimensional
> data that I have..the data is of the form {x,y,f(x,y)} and so far the
> function aa/(bb+cc Exp[-dd xy]) (where aa,bb,cc,dd are constants) seems
> to fit the data best but it is not quite accurate fit. I have used
> findfit to find this function. Is there a better way to find an exact
> function or should I keep experimenting? :-)
> 
> Thanks,
> 
> Raj
> 
You could check and do some experiments with the standard packages 
Statistics`NonlinearFit` [1] and NumericalMath`TrigFit` [2].

HTH,
Jean-Marc

1. 
http://documents.wolfram.com/mathematica/Add-onsLinks/StandardPackages/Statistics/NonlinearFit.html

2. 
http://documents.wolfram.com/mathematica/Add-onsLinks/StandardPackages/NumericalMath/TrigFit.html


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