Effacer les filtres
Effacer les filtres

Fitting experimental data to find a function

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Anoire BEN JDIDIA
Anoire BEN JDIDIA le 18 Oct 2016
Commenté : Gareth Lee le 18 Oct 2016
I have an experimental data I=f(t) and I want to find the equation of This trend.

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Gareth Lee
Gareth Lee le 18 Oct 2016
You can try polyfit function or other curve fit function, i.e. nlinfit or lsqcurvefit,to find proper equation. you also use cftool to curve or regress your data.
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Anoire BEN JDIDIA
Anoire BEN JDIDIA le 18 Oct 2016
I'm currently testing curve fitting toolbox but how can I know which is the best regression. Ps: in my case is a non linear regression
Gareth Lee
Gareth Lee le 18 Oct 2016
This is a complicate problem, it is hard to say which method is good. you only try it, and judge it with some mathematical index. I suggest that plot it firstly, and estimate the equation according to curve. try it, and obtain some good parameters.

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KSSV
KSSV le 18 Oct 2016
doc polyfit

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