确定信号和非确定信号的产生，各种滤波器的设计，对信号的频谱分析，滤波后信号的频谱分析等功能。有利于信号与系统、数字信号处理相关课程的学习与理解-Determine the signal and non-deterministic signal generation, a variety of filter design, spectral analysis of the signal, filtered signal spectrum analysis functions. Favorable