Re: CCL:curve fit?
- From: Walter Polkosnik <walt;at;panix.com>
- Subject: Re: CCL:curve fit?
- Date: Fri, 18 Oct 1996 17:05:12 -0400 (EDT)
On Fri, 18 Oct 1996 lawson;at;argus.cem.msu.edu wrote:
> I am looking for a program (fortran or C) that will fit
> a function (Morse like or n-order polynomial) to data (potential
> curve). Does anyone know of any free programs available. I
> checked the net and could not readily locate anything. I will
> summarize results.
> Dan Lawson
> Graduate Student
> Michigan State University
The best routines I've found at lmdif and nl2sol, both from netlib
(netlib.att.com). They are very robust nonlinear curve fitting routines. I
have looked through quite a lot that is available on the net, and I have
been very impressed with performance of both these routines. You will have
to write the driving program, since they are Fortran subroutines. I believe
lmdif is part of the 'matfit' package in netlib and nl2sol is part of the
TOMS collection of software.
Walter Polkosnik walt;at;panix.com
Physics Department http://www.physics.qc.edu/~walt
Queens College, City University of New York (718)-997-3364 voice
Credo quia absurdum est. (718)-997-3349 fax