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MathGroup Archive 2005

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Re: A Problem with the NonlinearFit?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg61870] Re: A Problem with the NonlinearFit?
  • From: "Kevin J. McCann" <kjm at KevinMcCann.com>
  • Date: Wed, 2 Nov 2005 04:09:42 -0500 (EST)
  • References: <200510280725.DAA08743@smc.vnet.net> <djv2em$o45$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

It is the error in the *physical* quantity that should be minimized. So, 
usually it is not the log space minimization.

Kevin

Chris Chiasson wrote:
> I think both regressions are correct. The reason you get different
> numbers is that a regression minimizes the total square error.
> Minimizing the square error in the log space is not the same as
> minimizing the square error in the non log space.
> 
> Does anyone have a kind of follow up or corollary to this? Eg, what do
> people normally do in this situation?
> 


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