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Re: alternative to CURVEFIT function [message #84379 is a reply to message #84371]

Wed, 29 May 2013 08:38

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

fd_luni@mail.com writes:

> I was wondering if anyone knows an alternative function of CURVEFIT. If I am not mistaken the CURVEFIT uses the Levenberg-Marquart algorithm. I need to use a different algorithm which provides a numerical solution to the problem of minimising a function, generally non-linear.
> Nelder–Mead method and Newton-Raphson are some choices but I was wondering if there is a function in IDL like the CURVEFIT.

Nearly all the experienced IDL users I know use Craig Markwardt's curve
fitting programs:

http://cow.physics.wisc.edu/~craigm/idl/fitting.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		Re: alternative to CURVEFIT function By: Craig Markwardt on Thu, 30 May 2013 21:56
		Re: alternative to CURVEFIT function By: Craig Markwardt on Thu, 30 May 2013 21:48
		Re: alternative to CURVEFIT function By: David Fanning on Thu, 30 May 2013 16:37
		Re: alternative to CURVEFIT function By: wlandsman on Thu, 30 May 2013 16:05
		Re: alternative to CURVEFIT function By: David Fanning on Thu, 30 May 2013 12:25
		Re: alternative to CURVEFIT function By: Meg on Thu, 30 May 2013 12:09
		Re: alternative to CURVEFIT function By: Russell Ryan on Thu, 30 May 2013 11:47
		Re: alternative to CURVEFIT function By: Craig Markwardt on Wed, 29 May 2013 18:39
		Re: alternative to CURVEFIT function By: Russell Ryan on Wed, 29 May 2013 13:15
		Re: alternative to CURVEFIT function By: David Fanning on Wed, 29 May 2013 08:38
		Re: alternative to CURVEFIT function By: Meg on Thu, 30 May 2013 12:05
		Re: alternative to CURVEFIT function By: Russell Ryan on Fri, 31 May 2013 05:59

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