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MathGroup Archive 2005

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Re: MiniMaxApproximation question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62662] Re: MiniMaxApproximation question
  • From: Paul Abbott <paul at physics.uwa.edu.au>
  • Date: Wed, 30 Nov 2005 05:40:36 -0500 (EST)
  • Organization: The University of Western Australia
  • References: <dkhlve$2d9$1@smc.vnet.net> <dksdoi$h8n$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In article <dksdoi$h8n$1 at smc.vnet.net>, michael_chang86 at hotmail.com 
wrote:

> Many thanks for your response and help; I tried the Padé approximation
> routine, and this is 'better', but I'm still seeking the ubiquitous
> Chebyshev 'equioscillation' (or 'alternation') behaviour in terms of
> *absolute* error.
> 
> Am I missing something simple here <doh!>?  For what I am seeking
> (equioscillation), it appears that Mathematica only optimizes for
> *relative* error.  Have I missed a more basic command that does what I
> want?

Surely MiniMaxApproximation in the NumericalMath`Approximations` is what 
you are after?

Cheers,
Paul

_______________________________________________________________________
Paul Abbott                                      Phone:  61 8 6488 2734
School of Physics, M013                            Fax: +61 8 6488 1014
The University of Western Australia         (CRICOS Provider No 00126G)    
AUSTRALIA                               http://physics.uwa.edu.au/~paul


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