Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1994
*January
*February
*March
*April
*May
*June
*July
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1994

[Date Index] [Thread Index] [Author Index]

Search the Archive

Nonliear Fit

  • To: MathGroup at yoda.physics.unc.edu
  • Subject: Nonliear Fit
  • From: Michael Buschmann <mike at mem.unibe.ch>
  • Date: Mon, 10 Jan 94 15:49:06 +0100

I'm trying to fit the magnitude of a nonlinear complex function 
of real variables to real data. I am using the NonlinearFit routine
in the Statistics standard package directory (John Novak Feb 1992)
When I am able to find an real analytic expression for the magnitude
of the complex function, the routine works fine. When I simply place
The Abs[] operator around the complex function, no fitting is 
done and the initial values are returned. When I use an interpolation
function to represent the magnitude of the complex function I get
a 'dmval' error message that the input value lies outside the domain
of the interpolation function, even though it does not. I would like to
get the fit working without having to always find an analytic expression
for the magnitude of the complex function. Either using the Abs[]
operator or an interpolation. Any ideas ?

Mike Buschmann





  • Prev by Date: Re: "Labels on 2D Graphs"
  • Next by Date: Interrupting 2.2 for ms-windows
  • Previous by thread: Re: "Labels on 2D Graphs"
  • Next by thread: Interrupting 2.2 for ms-windows