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Re: Fitting with three parameters ??? [message #88761 is a reply to message #88760]

Mon, 16 June 2014 03:55

Moritz Fischer
Messages: 32
Registered: June 2013

Member

Hi,
You should take a look at Craig's MPFIT routines:
http://cow.physics.wisc.edu/~craigm/idl/fitting.html
cheers

Am 16.06.2014 12:49, schrieb Madhavan Bomidi:
> 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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