这个程序描述了一个一到六阶的巴特沃斯低通滤波器以及其幅频特性。即滤波器的设计-This procedure describes a one to six-order Butterworth low-pass filter and its amplitude-frequency characteristics. The filter design

巴特沃斯MATLAB实现例子，包含高通、 低通 、带通、 带阻。(Butterworth matlab implementation examples, including high pass, low pass, band pass, band stop.)