最小二乘法及方程曲线，简单易懂，使用方便，适合初学者使用-The method of least squares and the equation of the curve, easy to understand, easy to use, suitable for beginners to use

最小二乘算法的充分展示，过程层次分明，可用于数值分析-Demonstrating least squares algorithm, structured process can be used for numerical analysis

在绘制的40*40的方格上，自己定义起点终点和障碍，用A*算法避开障碍物，规划出最短路径-On the paint of 40* 40 squares, define your own starting point to the end and obstacles, using A* algorithm to avoid obstacles, planning the shortest path