我上机实验时在matlab环境上编写的一个关于滤波器的程序文件。-This is a file about filter builded in matlab.

包含有信号源的数字滤波器设计，文件中包含有高通，低通，带通，带阻四种数字滤波器。-The program is used to design a digital filter.There are four kinds of digital filter included in the file.