p149 4

一个自己做的MATLAB第三章作业哦哦~~还不错哦哦~~~新手可以下来看看哦哦~

num=[1];
den=[1 1];
[numd,dend]=c2dm(num,den,0.1,'tustin')
w=logspace(-1,3);
[m,p]=dbode(numd,dend,0.1,w)
subplot(2,1,1),semilogx(w,20*log10(m))
grid
subplot(2,1,2),semilogx(w,p)
grid

num=[0 1];
den=[1 1];
[numd,dend]=c2dm(num,den,0.5,'zoh')
w=logspace(-1,3);
subplot(2,1,1);
dbode(numd,dend,0.1,w);
grid
subplot(2,1,2);
bode(num,den,w)
grid