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MathGroup Archive 2000

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Re: How to implement arg min f(x)?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg24942] Re: [mg24936] How to implement arg min f(x)?
  • From: BobHanlon at aol.com
  • Date: Thu, 24 Aug 2000 05:08:15 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

In a message dated 8/22/2000 4:41:37 PM, may106 at psu.edu writes:

>I want to implement arg min f(x), but when I use the FindMinimum
>function it returns the minimum and it returns the argument for the
>minimum in the form "x -> 1.234", i.e. a string.  I am using the
>minimization in a manner analogous to solving Ax=b for x by finding
>
>arg min  ||Ax-b||
>       x
>
>How do I pick off the value of x?
>

x /. FindMinimum[Abs[7x - 3], {x, 2, 4}][[2]]

0.428571


Bob Hanlon


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