ex0705.m

数字信号处理（机械工业出版社）的源码

% Chapter 7: Example 7.5 filter design
%	
n = 5; Wn = [100 200]/500;
[b,a] = butter(n,Wn);
freqz(b,a,128,1000)
figure
[y,t] = impz(b,a,101);
stem(t,y)