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Re: Method->NMinimize in FindFit Crashes the Kernel

• To: mathgroup at smc.vnet.net
• Subject: [mg89581] Re: [mg89539] Method->NMinimize in FindFit Crashes the Kernel
• From: Murray Eisenberg <murray at math.umass.edu>
• Date: Fri, 13 Jun 2008 06:12:32 -0400 (EDT)
• Organization: Mathematics & Statistics, Univ. of Mass./Amherst
• References: <200806120658.CAA08896@smc.vnet.net>
• Reply-to: murray at math.umass.edu

Works OK on my system: Mathematica 6.0.2.0, Windows XP SP3 (32-bit), 4GB 
RAM (not all visible to Windows XP, of course).

Result:  {m->1.92446,s->1.29603}

It doesn't crash on my Windows XP 32-bmachine

Kezhao Zhang wrote:
> I am running Mathematica 6.0.2.1 on 32-bit Windows Vista with 3GB of
> RAM. The following code crashes the Kernel:
> 
> x = Range[1, 10, 0.01];
> 
> y = Exp[-0.1 x];
> 
> FindFit[Thread[{x, y}], 1 - 1/2 Erfc[(m - Log[t])/(Sqrt[2] s)], {s,
> m}, t, Method -> NMinimize]


-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305

• References:
  • Method->NMinimize in FindFit Crashes the Kernel
    • From: Kezhao Zhang <kezhao.zhang@gmail.com>