内 蒙 古 科 技 大 学本 科 生 毕 业 设 计 说 明 书( 毕 业 论 文 )题 目 : 最 小 二 乘 曲线 拟 合 及 MATLAB 实现专 业 : 测 绘 工 程班 级 : 2025 测 绘 2 班最 小 二 乘 曲 线 拟 合 及 MATLAB实 现摘 要介绍曲线拟合的基本理论,对最小二乘原理进行了全方位的理论阐述,同时也阐述了曲线拟合的基本原理及多项式曲线拟合模型的建立。详细的解答了曲线拟合中的最小二乘法,并介绍了部分的正交最小二乘法理论。重点讲解多项式拟合的具体步骤,同时也介绍了非线性方程的最小二乘拟合,在建立理论的基础上对最小二乘曲线拟合法的MATLAB实现方法进行讨论,利用MATLAB2025b 的平台对测量数据进行最小二乘曲线拟合,介绍MATLAB的具体构造和曲线拟合工具。利用MATLAB中的ployfit 函数对实测数据进行多项式曲线拟合,并给出曲线拟合MATLAB实现的源程序,给出拟合曲线,并评定拟合的精度证明该方法是行之有效的。关键词:最小二乘法,曲线拟合,MATLAB,测量数据Curve Fitting in Least-Square Methodand Its Realization with MatlabAbstract To introduce the basic theory of curve fitting and discuss the least squares principle in this paper, what’s more, we also discuss the basic principle of curve fitting and the establishment of polynomial curve fitting model. Meanwhile, we also introduce the least-square method of curve fitting in detail and part of the theory of orthogonal least square method. We mainly discuss the specific steps of polynomial fitting, and also introduces the nonlinear equation of the least squares fitting at the same time, which established on the theory of least squares curve fitting in MATLAB in order to realize the method to do research. Using MATLAB2025b platform to achieve the goal of measuring data and introducing the special structure of MATLAB and curve fitting tool. We can use ployfit function in MATLAB to polynomial curve fitting of experimental data, and get the MATLAB source program about curve fi...