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Re: Constrained Fitting
| Re: Constrained Fitting [message #19452] |
Thu, 23 March 2000 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Lanette Friesen (lfriesen@irus.rri.on.ca) writes:
> I've been testing a number of the curve fitting routines in IDL with my
> data. I've been using mainly CURVEFIT and LMFIT. I have three
> parameters in a bi-exponential fit and I need to put constraints on
> these parameters. As far as I can tell, putting constraints on the
> parameters is not possible with the current fitting routines. Am I
> missing something? Is there a different fitting routine that I haven't
> found that allows either non-linear least squares fitting or something
> like it with constrained fitting parameters?
Anyone who is even *thinking* about curve fitting better
get themselves over to Craig Markwardt's page and check
out what he is making available:
http://cow.physics.wisc.edu/~craigm/idl/fitting.html
I don't know how IDL gets away without including his
stuff in the basic product. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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