gusucode.com > MATLAB与控制系统仿真实践 源代码 > MATLAB与控制系统仿真实践 源代码/第十四章/eg14_2.m
num=5; den=conv([1 2],[1 2 1]); w=logspace(-2,3,100); [mag,phase,w]=bode(num,den,w); magdB=20*log10(mag); subplot(2,1,1); semilogx(w,magdB); grid; title('ϵͳBodeͼ'); xlabel('Frequency(rad/sec)'); ylabel('Magnitude(dB)'); subplot(2,1,2); semilogx(w,phase); grid; xlabel('Frequency(rad/sec)'); ylabel('Phase(deg)');