mocexishuquxian3

代码说明：

说明：  这个程序用于MATLAB中，可以打开多个TXT文件，并保存成mat格式的文件，接着继续绘制图形，最后根据曲线的情况，可以进行最小二乘的拟合。(This program is used in MATLAB. It can open multiple TXT files and save them in mat format. Then it can continue to draw graphics. Finally, according to the situation of the curve, it can be fitted by least squares.)