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