www.pudn.com > controlsystem.ZIP > EX3027.M

% Example 3.27 
% 
num=0.632; 
den=[1,-1.368,0.568]; 
[z,p,k]=tf2zp(num,den); 
p 
dnyquist(num,den,0.1) 
title('Discrete Nyquist Plot'); 
figure(2) 
[num1,den1]=cloop(num,den); 
dimpulse(num1,den1) 
title('Discrete Impulse Response')