比较MATLAB的数值计算结果和COMSOL的仿真结果，主要是文件操作和数据处理-Comparing the results of MATLAB and COMSOL numerical calculation of the simulation results, mainly file operations and data processing

位COMSOL需要大量分段函数而写的MATLAB程序-Rapid production piecewise function program to facilitate the use of a large number of indexing function COMSOL situation.