matlab 画viviani曲线+绘制分子结构+最小二乘拟合+求信号包络线+滤波器设计（一次为大家提供5个matlab完整程序，能调试准确的结果仿真图）-matlab draw viviani curve++ least-squares fit to draw the molecular structure of++ request signal envelope filter design

用MATLAB作非线性最小二乘拟合 Matlab的提供了两个求非线性最小二乘拟合的函数：lsqcurvefit和lsqnonlin。-Use MATLAB for nonlinear least squares fitting, MATLAB provides two nonlinear least-square fitting function: lsqcurvefit and lsqnonlin.

非归零型差分相位调制信号建模与仿真分析 ，利用最小二乘算法实现对三维平面的拟合，内含心电信号数据及运用MATLAB写的源代码。- NRZ type differential phase modulation signal modeling and simulation analysis, Least-squares algorithm to fit a three-dimensional plane, ECG data and includes source code written in MA