Adding a best fit curve to a scatter plot

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Thishan Dharshana Karandana Gamalathge 2019-5-4

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https://ww2.mathworks.cn/matlabcentral/answers/460301-adding-a-best-fit-curve-to-a-scatter-plot

评论： John Doe 2019-5-4

I have a scatter plot consisted of 620 points. I want to set the best fit curve rather than me using the "polyfit" function and then use "polyval". In that case I am the one who changes the degree. I also want to show the equation corresponsing to the best fit curve.

When explaining me the procedure, please use some random numbers to X and Y vectors so I can better understand it.

Thanks,

Thishan

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John D'Errico 2019-5-4

Sorry, but no. Finding the "best" fit curve with no information provided is essentially a search through infinitely many possible model forms. Without intelligent input from the user, this can be virtually impossible.