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MathGroup Archive 2006

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Re: Points sampled by FindMinimum

  • To: mathgroup at smc.vnet.net
  • Subject: [mg71128] Re: Points sampled by FindMinimum
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Thu, 9 Nov 2006 03:37:31 -0500 (EST)
  • Organization: The Open University, Milton Keynes, UK
  • References: <eisfsu$mrp$1@smc.vnet.net>

Andrew Moylan wrote:
> Hi all,
> 
> Please consider the following code, which asks FindMinimum to minimise
> a simple parabolic function while tracking at which which points
> FindMinimum evaluates the function:
> 
> func[x_?NumericQ] := (Print[x]; 1 + (x - 1)^2)
> FindMinimum[func[x], {x, 0.1}]

The option *StepMonitor* is better suited to this purpose

In[1]:=
func[(x_)?NumericQ] := 1 + (x - 1)^2
FindMinimum[func[x], {x, 0.1}, StepMonitor :> {Print[x]}]

 From In[1]:=
0.6

 From In[1]:=
1.

 From In[1]:=
1.

Out[2]=
{1.,{x\[Rule]1.}}

Regards,
Jean-Marc


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