说明：  基于labview虚拟平台，利用mathscript节点和m文件进行编程，实现不同相位波形的发生和显示，还可以实现输出波形的采样点、幅值、周期等的改变
(Labview-based virtual platform, using mathscript nodes and m file programming, and the occurrence of phase waveform display, you can also achieve the output waveform sampling points, the amplitude, period and other changes)