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Method->NMinimize in FindFit Crashes the Kernel

• To: mathgroup at smc.vnet.net
• Subject: [mg89539] Method->NMinimize in FindFit Crashes the Kernel
• From: Kezhao Zhang <kezhao.zhang at gmail.com>
• Date: Thu, 12 Jun 2008 02:58:50 -0400 (EDT)

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]


FindFit with Method->NMinize works fine when the number of data points
is small, e.g., x=Range[1,10,0.1].

I wonder whether this is a bug or there is a way to  prevent the
kernel crash.

Thanks.

Kezhao

• Follow-Ups:
  • Re: Method->NMinimize in FindFit Crashes the Kernel
    • From: Murray Eisenberg <murray@math.umass.edu>