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Fitting with three parameters ??? [message #88760]

Mon, 16 June 2014 03:49

atmospheric physics is currently offline

atmospheric physics
Messages: 121
Registered: June 2010

Senior Member

Hello,

I have two columns of data, say variables X and Y. Now I want to fit the data with a function Y = x1 - x2 * exp(-x3 * X). I do not know what the values of x1, x2 and x3.

Can anyone say if there is automatic way in IDL to define our fitting function and then obtain the fitted parameters to the data? How is non-linear fitting done in IDL? Also, I would like to know which function will be able to give me R2 correlation coefficient?

Thanks in advance,
Madhavan

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[Message index]

		Fitting with three parameters ??? By: atmospheric physics on Mon, 16 June 2014 03:49
		Re: Fitting with three parameters ??? By: Moritz Fischer on Mon, 16 June 2014 03:55
		Re: Fitting with three parameters ??? By: Russell Ryan on Mon, 16 June 2014 12:22

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