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gaussfit question [message #17552]

Fri, 29 October 1999 00:00

mirko[1]
Messages: 3
Registered: October 1999

Junior Member

Hi!

I have a 2D dataset representing a surface (intensity plot of x-ray
scattering data)
and i like to fit these data with GAUSS2DFIT() function which does not work.
So I tried to fit one line of the dataset wit GAUSSFIT which does not
work either.

This it is confusing to me because other math computer programs
have no problem with this simple curve.
Is there something I have to consider?

Cheers

Mirko

IDL> y=[52.0,52.7,56.0,60.9,65.40,71.40, 75.20,
80.80,86.1,89.8,88.3,94.8,94.9,100.5,100.1,103.9,105.3,106.2 ,107.3,
108.2,106.1,105.7,107.8,102.2,
101.3,97.2,92.1,87.4,87.0,82.5,77.4,69.9,67.7, 62.1, 58.9, 53.4,53.8]
IDL> x=findgen(37)
IDL> yfit=gaussfit(x,y,a)
% Compiled module: GAUSSFIT.
% Compiled module: POLY_FIT.
% Compiled module: CURVEFIT.
% Program caused arithmetic error: Floating underflow

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[Message index]

		gaussfit question By: mirko[1] on Fri, 29 October 1999 00:00
		Re: gaussfit question By: mirko[1] on Mon, 01 November 1999 00:00
		Re: gaussfit question By: <karri on Mon, 01 November 1999 00:00

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