BEST FIT OF SCATTERED DATA

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Giuseppe Degan Di Dieco 2021-6-29

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https://ww2.mathworks.cn/matlabcentral/answers/868053-best-fit-of-scattered-data

评论： Giuseppe Degan Di Dieco 2021-7-21

Hello Beautiful,

I came up with the attached plot of scattered data, and because I'm not so good at fitting techiniques, and less in Matlab,

I wonder if someone can give me some tips on how to best fit the data.

Thanks in advance to everyone, and take care.

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KSSV 2021-6-29

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https://ww2.mathworks.cn/matlabcentral/answers/868053-best-fit-of-scattered-data#answer_735908

在 MATLAB Online 中打开

Let (x,y) be your points.

p = polyfit(x,y,1) ;  % change the degree 
yi = polyval(p,x) ;
plot(x,y,'.r',x,yi,'b')

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Giuseppe Degan Di Dieco 2021-6-30

Dear KSSV,

thanks for your promt reply, much appreciated.

I'll test it, and let you know the results.

Best.

Giuseppe Degan Di Dieco 2021-7-21

Dear KSSV,

thanks for your help.

It was useful, and I used polynomials as fitting functions.

I wonder if novel methods exist to divided data in clusters, and then used and combined different fitting functions along the data pattern distribution.

Best.

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