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trying to fit x1 and y1 and in result want fitted value but for that this error is coming ? How can I improve my result?

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RS
RS 2013-8-25
关闭： MATLAB Answer Bot 2021-8-20
In polyfit at 76
Warning: Polynomial is badly conditioned. Add points with distinct X values, reduce
the degree of the polynomial, or try centering and scaling as described in HELP
POLYFIT.

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Image Analyst
Image Analyst 2013-8-25
编辑：Image Analyst 2013-8-25
When you get that error, you must use the S and mu arguments. See the help for polyfit, as the error message directed you to.
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RS
RS 2013-8-27
again same type of error coming how can I make good results warning(message('MATLAB:polyfit:RepeatedPoints'));
In polyfit at 74 Warning: Polynomial is badly conditioned. Add points with distinct X values or reduce the degree of the polynomial.
I am using this
[p S mu]= polyfit(x1(1:xxx),y2,3);

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