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?