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Re: FindFit::nrlnum Error Message

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  • Subject: [mg128618] Re: FindFit::nrlnum Error Message
  • From: benz <sitthichaisa at gmail.com>
  • Date: Sat, 10 Nov 2012 02:07:32 -0500 (EST)
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  • References: <20121108070746.0F6FA68B5@smc.vnet.net> <k7hh2u$nuf$1@smc.vnet.net>

Murray Eisenberg =E0=B9=80=
=E0=B8=82=E0=B8=B5=E0=B8=A2=E0=B8=99=E0=B8=A7=E0=B9=88=E0=B8=B2:
> On Nov 8, 2012, at 2:07 AM, benz <sitthichaisa at gmail.com> wrote:
>
>
>
> > I'm trying to fit the data to the curve using FindFit function and i got Error Message
>
> >
>
> > FindFit::nrlnum: The function value {1.49186*10^20-9.32484*10^16 I,1.59454*10^18-2.00252*10^15 I,<<8>>,<<99>>} is not a list of real numbers with dimensions {109} at {RMSX1,aX1,nX1,mX1} = {-841.739,86.6839,-24.2917,-11.7296}.
>
> >
>
> > I'm trying to solve it for days now and i really have no idea what to do next. Plz help!
>
> >
>
> > this is the link
>
> > 
>
> http://www.4shared.com/file/54Tpu4BB/plz_help_FitFit_Error_Message.html?
>
>
>
>
>
> Hard to answer without seeing the model you're trying to use. But evidently some numerical "fuzz" is involved. You probably can solve it by using Chop to get rid of the small imaginary terms 9.32484*10^16 I, etc.
>
>
>
> ---
>
> Murray Eisenberg                                   
>
> murray at math.umass.edu
>
> Mathematics & Statistics Dept.     
>
> Lederle Graduate Research Tower            phone 413 549-1020 (H)
>
> University of Massachusetts                               413 545-2838 (W)
>
> 710 North Pleasant Street                         fax   413 545-1801
>
> Amherst, MA 01003-9305

Sorry for my mistake, This is the link of equation I'm using. Thanks !

http://www.4shared.com/photo/ybdQBp4m/Equation.html?



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