eg10_12_2.m

matlab7.0从入门到精通(光盘内容)

fs=1000;
wp=[100 200]*2/fs;
ws=[30 300]*2/fs;
rp=3;
rs=30;
Nn=128;
[N,wn]=cheb1ord(wp,ws,rp,rs)
[b,a]=cheby1(N,rp,wn)
freqz(b,a,Nn,fs)