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MathGroup Archive 2005

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Re: Nonlinear Fittings: range / boundaries are not working :(

  • To: mathgroup at smc.vnet.net
  • Subject: [mg53934] Re: [mg53898] Nonlinear Fittings: range / boundaries are not working :(
  • From: Mary Beth Mulcahy <Mary.Mulcahy at colorado.edu>
  • Date: Fri, 4 Feb 2005 04:12:04 -0500 (EST)
  • References: <200502022310.SAA11925@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Do you mean can you restrict the range Mathematica will allow a variable to
fit to?  Like if you know x should be between 1 and 5, only allow an output
between 1 and 5?  If so, I don't think you can do that based on earlier posts
I have read.  You can though have a range in your equation if it is, for
example, part of a sum.  So Sum[x+2, {x, 1, 5, 1}] will work in an equation
that you are fitting, but you are then defining x and not fitting it.  If this
isn't what you mean, please post an example problem with data.

mary beth

Quoting "K.M.Lebecki" <LebeckiHatesSpam at ifpan.edu.pl>:

> Hi all,
>
>
>
> I have a hunch that the problem is already known in this group.
>
> But to put it clear:
>
> In functions like NonlinearRegress, you can formally use the syntax
> "{symbol, min, max}" - but it is not working!
>
> I found already few posts about it. But still no clear and
> easy-to-understand solution can be found (at least I did not find it...).
>
> So, if somebody already solved it, and wrote a code which fixes that
> behavior (*any* other reasonable solution is also welcome) - please share
> it with me ;)
>
>
>
> Regards, Chris
>
>
>
> P.S. Mathematica 4.2, Windows 2000 - if anyone cares.
>


University of Colorado


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