Re: CCL:curve fit?



 On Fri, 18 Oct 1996 lawson;at;argus.cem.msu.edu wrote:
 >
 > 	Hello,
 >  		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.
 >
 > 	Thanks
 > 	Dan Lawson
 > 	lawson;at;argus.cem.msu.edu
 > 	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