22 lines
769 B
C++
22 lines
769 B
C++
#ifndef GAUSSPOLYCOE_H
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#define GAUSSPOLYCOE_H
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#include <vector>
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class GaussPolyCoe {
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public:
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// 高斯消元法求解线性方程组 Ax = b
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static std::vector<double> GaussianElimination(std::vector<std::vector<double>> A, std::vector<double> b);
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// 多项式拟合：返回系数 [a0, a1, ..., an] 表示 y = a0 + a1*x + ... + an*x^n
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static std::vector<double> PolynomialFit(const std::vector<double>& x, const std::vector<double>& y, int degree);
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// 计算拟合曲线在x处的值
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static double Predict(const std::vector<double>& coeffs, double x);
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// 计算均方误差
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static double MeanSquareError(const std::vector<double>& x, const std::vector<double>& y, const std::vector<double>& coeffs);
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};
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#endif // GAUSSPOLYCOE_H
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