Re: Non-Linear implicit Curve Fitting

[Christian Kascha]

Am 15.11.2013 18:22, schrieb Giftig:
> Good Day
>
> I have two data sets.x and F that has about 10000 points each.
>
> I also have the following equation:
> F = C_CV .* alpha.^( x - 1) .* sqrt(a .* F.^2+ b * F + c)
>
> I want to fit that equation on the data above. everything is unknown as
> specified.
> Any idea on how to accomplish this?
>
> I tried a few methods put nothing gave me a proper fit
>
> Thank you
>
>
>
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I would try non-linear least squares with "fminsearch" or "fminunc" from 
the optim package. (http://octave.sourceforge.net/optim/index.html)

Best,
Christian