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Re: Data fitting with Mathematica 3.0

  • To: mathgroup at smc.vnet.net
  • Subject: [mg15486] Re: [mg15423] Data fitting with Mathematica 3.0
  • From: "Sherman.Reed" <sherman.reed at worldnet.att.net>
  • Date: Mon, 18 Jan 1999 04:22:28 -0500
  • Sender: owner-wri-mathgroup at wolfram.com

Sergio,
one solution is to use cubic splines for fitting.

if you like, pick a point through which you want the function to go
through, and I will do a demo for you.
Sherman C. Reed
sherman.reed at worldnet.att.net
-----Original Message-----
From: Sergio Luis dos Santos e Lucato <lucato at hrzpub.tu-darmstadt.de>
To: mathgroup at smc.vnet.net
Subject: [mg15486] [mg15423] Data fitting with Mathematica 3.0


>Hi,
>
>Does anyone know how to tell Mathematica 3 that the resulting funktion f
>has to go trough a certain point? I can not change my function, since
>it is a physical modell. That is the coefficients have to be found the
>way, that my conditions are met even if it is not the best fit. I could
>not find any options in the manual.
>
>un = Function[{x, n}, (1-x/c)^(n+0.5)]; f = Fit[werte, Table[un[x, n],
>{n, 0, 2}], x];
>
>Thanks, Sergio
>
>



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