Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2007
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2007

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

Search the Archive

Re: Stalled at a point

  • To: mathgroup at smc.vnet.net
  • Subject: [mg75252] Re: Stalled at a point
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Sun, 22 Apr 2007 05:09:05 -0400 (EDT)
  • References: <f09fmg$kj$1@smc.vnet.net>

Hi,

try NMinimize[] that uses global methods to find the
minimum. You may have to write out the objective
function of your fit by your self.

Regards
   Jens

Fulya BaÄ?cı wrote:
> Hello everyone,
> 
> I want to fit data to a function and find two parameters beta and beam
> radius.I use NonlinearRegress for this. But it gives this error after 10
> iterations:
> The step size in the search has become less than the tolerance prescribed by
> the PrecisionGoal option, but the gradient is larger than the tolerance
> specified by the AccuracyGoal option. There is a possibility that the method
> has stalled at a point which is not a local minimum.
> What do I have to do ?
> Any help is greatfully appreciated.
> Thank you,
> 
> Fulya
> 
> 


  • Prev by Date: Re: Optimisation of FourierCoefficients
  • Next by Date: question
  • Previous by thread: Re: Stalled at a point
  • Next by thread: Optimisation of FourierCoefficients