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MathGroup Archive 2005

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Re: FindMinimum -- MaxIterations

  • To: mathgroup at smc.vnet.net
  • Subject: [mg53297] Re: FindMinimum -- MaxIterations
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Wed, 5 Jan 2005 01:21:10 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <crdlub$r9d$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

it depend on the Method you or Mathematica choose,
because the numerical algorithm is responsible for the
number of function evaluations it need to find the
minimum.

Regards
  Jens

"Alan" <info at optioncity.REMOVETHIS.net> schrieb im Newsbeitrag 
news:crdlub$r9d$1 at smc.vnet.net...
> Consider running FindMinimum with an objective
> function with N > 1 parameters. I count the number of
> times the objective function is evaluated prior to
> convergence (or early termination) --- let's call this count C.
>
> The default value for MaxIterations is 100.
> Leave all parameters at the defaults.
> My question is: how large will C get before 100 iterations occur?
> In other words, exactly what is an "iteration" under the
> defaults?
>
> Experience with N say, in the range 3 to 9,
> suggests that C is larger than 100 N, but other than that,
> I have no clue.
>
> Thanks in advance,
> alan
>
> 



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