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代码说明：

//=== === === === === === ===== //函数说明 //函数名称：Correlation //函数功能：计算最小二乘法拟合的多项式的相关系数 //使用方法：int M------ 拟合多项式的阶数（已知条件） // double *b--- 拟合曲线的系数,排列顺序为由高阶到低阶（已知条件） // double *x--- 结点x轴数据（已知条件） // double *y--- 结点y轴数据（已知条件） // double *Yg-- 结点估计值，个数为m（过程变量） // int m------ 结点个数（已知条件） //注意事项：多项式阶数最高为10,多项式的形式为 y = a0 + a1x +a2x2 -//=== === === === === ==== === === === === === === =// letter Description// function name : Correlation// Function functions : Calculation least squares polynomial fitting of the correlation coefficient// Use : int M------ polynomial fitting stage (known condition)//* b--- double fitting song The coefficient, Higher-order the order on grounds of low order (known condition)//* double-node x x axis data (known to be pieces)// double* y--- node y-axis data (known condition)//* double FSL-- Nodes estimates, Number m (process variables)// int m------ node number (known condition)// Note : polynomial order of a maximum of 10. polynomials in the