The Control System Toolbox plotting functions are resistant to most attempts to modify their plot characteristics. If I want a customised plot, I ask for the outputs from the bode, then plot them as ordinary subplot plots:
[mag,phase,wout] = bode(sys);
Example —
sys = tf(4,[1 0.5 4]);
[mag,phase,wout] = bode(sys);
figure(1)
subplot(2,1,1)
semilogx(wout, 20*log10(squeeze(mag)), '-r', 'LineWidth',2)
grid
subplot(2,1,2)
semilogx(wout, squeeze(phase), '-r', 'LineWidth',2)
grid
Best Answer