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Re: Find a function that fits two dimensional data

• To: mathgroup at smc.vnet.net
• Subject: [mg67268] Re: Find a function that fits two dimensional data
• From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
• Date: Thu, 15 Jun 2006 03:25:44 -0400 (EDT)
• Organization: Uni Leipzig
• References: <e6op8s$s2m$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi

idealy you have a physical model that may be valid 
and you
can add some coefficients to the model to obtain a 
better
fit. For example, the physical model say the 
function should
have the form Exp[-a*x] and you add 
(c+b*x)*Exp[-a*x]

Regards
  Jens

"Raj" <rajanikanth at gmail.com> schrieb im 
Newsbeitrag news:e6op8s$s2m$1 at smc.vnet.net...
| 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
|