What is difference between fit and fitlm function in MATLAB?

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Meghraj Kc
Meghraj Kc 2022-6-21
回答： Sam Chak 2022-6-22
I am trying to fit the data between two variable i.e., x and y. For fitting the data I am using fit and fitlm function.Upto the polynomial order 2 (poly2) I am geeting the same coefficient value from both function but while using the higher order polynomial greater than 2 I am geeting NaN value from fitlm function and some value from fit function. What is the reason behind this?
I have attached the screenshot of difference between two function and also the excel sheet that includes my data.

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Sam Chak
Sam Chak 2022-6-22

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