Fitting experimental data to find a function

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Anoire BEN JDIDIA
Anoire BEN JDIDIA 2016-10-18
评论： Gareth Lee 2016-10-18
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 2016-10-18
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 2016-10-18
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 2016-10-18
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 2016-10-18
doc polyfit

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