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Re: Problem with mpfit.pro [message #89397 is a reply to message #89396]

Mon, 06 October 2014 22:44

Mats Löfdahl
Messages: 263
Registered: January 2012

Senior Member

Den tisdagen den 7:e oktober 2014 kl. 01:26:26 UTC+2 skrev Payam Bagheri:
> Hi there,
>
>
>
> Has anyone worked with the fitting procedure mpfit.pro in IDL? When my fitting function exceeds around 3600 characters (I have to use really large fitting functions) the code gives me this error:
>
>
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> % MPFITEXPR: ERROR: execution of "The FUNCTION" failed
>
> % MPFITEXPR: check syntax and parameter usage
>
>
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> Has any seen this and knows a work-around?
>
>
>
> Thanks,
>
> Payam

According to your error message, you are not using mpfit directly, you are using mpfitexpr. Mpfitexpr allows you to specify the function to minimize as a string but that is only useful for simple expressions.

If you use mpfit directly, you can specify your function as an idl function and specify just the name of it in the call to mpfit. Then there is no limit to how complicated your fitting function can be.

(OK, I guess there is a limit but it's not 3600 characters...)

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[Message index]

		Problem with mpfit.pro By: Payam Bagheri on Mon, 06 October 2014 16:26
		Re: Problem with mpfit.pro By: Mats Löfdahl on Mon, 06 October 2014 22:44
		Re: Problem with mpfit.pro By: Craig Markwardt on Tue, 07 October 2014 08:27

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