Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

FindFit & NIntegrate

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96124] FindFit & NIntegrate
  • From: hmalissa <hans.malissa at gmx.net>
  • Date: Thu, 5 Feb 2009 04:42:33 -0500 (EST)

I want to use the FindFit function (or similar) to fit some
experimental data:

fit=FindFit[data,expr,pars,vars]

Usually this works very well, but in this particular case the model
expr consists of a NIntegrate over another function, like:

model[x_,a_,b_,c_]:=NIntegrate[function[x_,t_,a_,b_,c_],{t,0,inf}];
fit=FindFit[data,model[x,a,b,c],{a,b,c},x]

FindFit now complains about non-numerical values; of course that makes
sense.
How can I force FindFit to do the fitting anyway?


  • Prev by Date: Re: Implementation of Minimize for integer programming in Mathematica
  • Next by Date: Re: Implementation of Minimize for integer programming in Mathematica 7
  • Previous by thread: Re: Re: Implementation of Minimize for integer programming
  • Next by thread: Re: FindFit & NIntegrate