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MathGroup Archive 1996

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Re: desperately seeking better minimax approximation package

  • To: mathgroup at smc.vnet.net
  • Subject: [mg4183] Re: desperately seeking better minimax approximation package
  • From: Harald Berndt <haraldb at nature.berkeley.edu>
  • Date: Tue, 11 Jun 1996 00:54:12 -0400
  • Organization: University of California Forest Products Lab
  • Sender: owner-wri-mathgroup at wolfram.com

John Bunda wrote:
> 
> the maximum error is minimized. For example, sin(x) could be
> approximated as:
>     p(x) = c1x + c3*x^3 + c5*x^5 + ...
> where c1, c3, and c5 are chosen to minimize the maximum error
> between p(x) and sin(x).  The trouble with the minimax package
> that comes with Mathematica is it requires me to have terms
> with strictly sequential powers - I can't skip the x^2 and x^4

Skipping x^2 and x^4 means c2 and c4 would be 0, no? I'm not sure I 
see the problem.

-- 
_______________________________________________________________
Harald Berndt                          University of California
Research Specialist                  Forest Products Laboratory
Phone: 510-215-4224                            FAX:510-215-4299
_______________________________________________________________


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