本程序是由matlab编写的频谱分析仪器，可以生成正弦、方波、三角波或混有白噪声的信号，还可以对信号进行指定点数的频谱分析。-This program is written by the matlab spectrum analysis instrument that can generate sine, square, triangle, or mixed with white noise signal, you can also specify the signal spectrum ana

三角形网格划分, 自由网格和结构网格划分，包括主要的matlab文件和函数，使用main.m 执行(mesh triangle grid using matlab, free mesh and structured mesh. The file include mfiles and functions. The program could be run through main.m)