From: a_chilakapati@ccmail.pnl.gov ( Ashokkumar Chilakapati )
Newsgroups: sci.math.num-analysis
Subject: Re: 4 parameter curve fitting
Date: 21 Apr 1995 20:36:20 GMT

NETLIB has several codes for nonlinear regression. They are quite good. The ones I use
frequently are DQED (by Richard Hanson)  and a version of NL2SOL (Dennis , Schnobel & Gay).

Good Luck.

- ashok

---
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Ashokkumar Chilakapati			 %%
BATTELLE, Pacific Northwest Laboratories 		 %% a_chilakapati@ccmail.pnl.gov
P.O. Box 999				 %% Phone : (509) 372 - 6077
Mail Stop K9-36			 %% Fax   : (509) 372 - 6089
Richland, WA 99352

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%