最小二乘法多项式曲线拟合，根据给定的m个点,并不要求这条曲线精确地经过这些点，而是曲线y=f(x)的近似曲线。(The least squares polynomial curve fitting, according to the given M point, does not require the curve to pass precisely these points, but rather the approximate curve of the curve y=f (x).)