curve-fit software?

[Jeffrey A. Messer]

Michael L. Doyle wrote:
> 
> I am in search of a user friendly software program for curve-fitting and
> plotting.  Would like to fit with MULTIPLE independent variables
> simultaneously.  Would also like to be able to define parts of complex
> functions on separate lines.
> 
> Any advice?   Thanks much.


Microcal Software's Origin is probably what you are looking for.  It has a 
large number of pre-defined fitting functions.  You can also enter your own 
fitting functions without much problem, although it is rather slow.  The 
latest version that I have used is 4.0.  It is a 16-bit Windows program and 
runs comfortably on a dx2-66 with 8mb.  A 32-bit version is due out soon, this 
may improve the speed of the user-defined fitting functions.  They probably 
have a web site, but here is the Letter Head:
	
	Microcal Software, Inc.
	One Roundhouse Plaza
	Northhampton, MA 01060 USA
	(800)969-7720
	Tel (413) 586-2013
	Fax (413) 585-0126
-- 
Jeff Messer
Department of Biochemistry - UNH
Biological Science Center
46 College Road
Durham, NH 03824-3544