Math Problem Statement
# 拟合函数 def curve_fit(x, y, func, initial_guess): popt, pcov = curve_fit(func, x, y, p0=initial_guess, maxfev=100000) return popt, pcov # 最小二乘法拟合 def least_squares_fitting(x, y, func, initial_guess): def residuals(p, x, y): return func(x, *p) - y result = least_squares(residuals, initial_guess, args=(x, y), method='trf', max_nfev=100000) return result.x, result.jac if method_label == "curve_fit (Levenberg-Marquardt)": popt, pcov = curve_fit(func, x, y, p0=guess, method='lm', maxfev=10000) elif method_label == "least_squares (Trust-Region)": popt, jac = least_squares_fitting(x, y, func, guess, method='trf') elif method_label == "least_squares (Levenberg-Marquardt)": popt, jac = least_squares_fitting(x, y, func, guess, method='lm')相互一致
Solution
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Math Problem Analysis
Mathematical Concepts
Curve Fitting
Least Squares
Levenberg-Marquardt Algorithm
Trust-Region Algorithm
Formulas
Non-linear least squares optimization formula
Residual calculation: func(x, *p) - y
Theorems
Least Squares Method
Levenberg-Marquardt Theorem
Suitable Grade Level
Advanced undergraduate or graduate level
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