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 Post subject: Rational function fit
PostPosted: Mon Oct 08, 2012 4:20 pm 

Joined: Mon Oct 08, 2012 4:05 pm
Posts: 1

I wold like to know if is possible to fit a rational function using the Levenberg-Marquardt method (Least-Squares).

In the figure below there are the equations (01, 02 and 03)

I want to derive the parameters, through my experimental data.

Is it possible?

thank you very much,


Equa??es_Fun??es_Transferencia.png [ 15.6 KiB | Viewed 2695 times ]
 Post subject: Re: Rational function fit
PostPosted: Wed Oct 10, 2012 8:02 am 
Site Admin

Joined: Fri May 07, 2010 7:06 am
Posts: 878
It is hard to understand what these function mean :) Is it three separate fitting problems, or one problem with three functions? If so, how these functions should be combined? Another question - what is the difference between small Greek coefficients (alpha's) and A/B/G/K? Do we fit with respect to some of these coefficients, considering other fixed, or what?

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