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Re: learning how to use mpfit,. need help [message #87741 is a reply to message #87740]

Tue, 25 February 2014 13:44

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

alkyl47@gmail.com writes:

> I am new to idl and learning how to use mpfit but run into error, please help if you have time.
>
>
> IDL version 6.3
>
> ////////////////////
> IDL> x = findgen(101)
> IDL> y = 25.*exp(-(x-32.)^2/(2*5.^2))+2.*randomn(0,101)
> % Program caused arithmetic error: Floating underflow
> ///////////////////
>
> these are the tutorial from the daedalus.as.arizona.edu group.

Can't help you with MPFIT because I can't even see where you are using
it. I can help with underflow errors, the nemesis of many an IDL
programmer:

http://www.idlcoyote.com/math_tips/underflow.html
http://www.idlcoyote.com/code_tips/underflow.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]

		learning how to use mpfit,. need help By: alkyl47 on Tue, 25 February 2014 13:35
		Re: learning how to use mpfit,. need help By: David Fanning on Tue, 25 February 2014 13:44
		Re: learning how to use mpfit,. need help By: alkyl47 on Tue, 25 February 2014 13:55
		Re: learning how to use mpfit,. need help By: Harald Frey on Tue, 25 February 2014 15:42
		Re: learning how to use mpfit,. need help By: Craig Markwardt on Tue, 25 February 2014 20:13

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