Re: FindFit & NIntegrate
- To: mathgroup at smc.vnet.net
- Subject: [mg96206] Re: FindFit & NIntegrate
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Mon, 9 Feb 2009 05:35:18 -0500 (EST)
- References: <gmecbc$acc$1@smc.vnet.net> <gmguqa$2u0$1@smc.vnet.net> <gmndis$s0g$1@smc.vnet.net>
Hi, no, but the news group has rules http://smc.vnet.net/mathgroup.html and one of these rules is: "PLEASE SEARCH THE ARCHIVES BEFORE YOU ASK WHAT MIGHT BE A COMMON QUESTION" and I think a poster in the group should try to follow the group rules. Regards Jens ADL wrote: > Dear Jens-Peer, > if a questions appears over and over ("10^6 times before") it should > mean something to thinking people! > > Latins used to say, "Errare humanum est, perseverare diabolicum". Does > this mean anything to Mathematica developers? Do you mean that it is > impossible to find a sensible way to do something that 10^6 people > would do differently? > > ADL > > > On 6 Feb, 10:10, Jens-Peer Kuska <ku... at informatik.uni-leipzig.de> > wrote: >> Hi, >> >> and >> >> model[x_?NumericQ,a_?NumericQ,b_?NumericQ,c_?NumericQ]:= >> NIntegrate[function[x_,t_,a_,b_,c_],{t,0,inf}]; >> >> will work. We had this 10^6 times before. >> >> Regards >> Jens >> >> >> >> hmalissa wrote: >>> 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? > >