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Re: Nonlinearfit to Data

  • To: mathgroup at
  • Subject: [mg17085] Re: Nonlinearfit to Data
  • From: jim leddon <jleddon at>
  • Date: Fri, 23 Apr 1999 02:32:18 -0400
  • Sender: owner-wri-mathgroup at

[Contact the author to get a notebook that was attached - moderator]

Hi folks,

I am trying to fit a data set of length = 311 points which represent 
std. deviations values. As seen in the attached file, a listplot of the 
data looks as if the data follows a strechted exponential plus a 
modulated (sin/Cos func.) inverse power law
of the form:
		a Exp[-alpha -beta x^n] + (A + B Sin[phase + 2 Pi x]) x^-m  .

I've tried using the "NonLinearFit function and the fit that I've gotten 
is about the best I can get at this point after a significant amount of 
tweeking!. Anybody have any ideas on how to achieve a better fit to this 

I'd appreciate any suggestions/ help.


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