Can I zoom an area in Bode magnitude diagram?

Hi everyone; I have a bode magnitude diagram but i need to zoom the first peak point on the same bode magnitude diagram. Thanks in advance

Answer 1

[Star Strider]

The bode function has some restrictions. However you can use the GUI zoom, pan, data cursor, and other functions as you would in any other plot window. Click the magnifying glass with the + sign to zoom in, and the one with the - sign to zoom out. All the other plot window GUI functions work with bode as well.

[Muna Shehan]

Thanks for answering. I just want to be sure is there a possibility to zoom a certain area. Thanks a lot

[Star Strider]

My pleasure.

If you want to customize the plots that bode produces, call bode with the first three output arguments, then plot them in a conventional subplot. You can then do anything you could do with any other plot object.

Example —

% — This is for a SISO system —  
[mag,phs,wout] = bode(sys);
Magnitude = squeeze(mag);
Phase = squeeze(phs);

figure(1)
subplot(2,1,1)
plot(wout,20*log10(Magnitude(1,:)))
title('Magnitude (dB)')
grid
subplot(2,1,2)
plot(wout,Phase(1,:))
title('Phase (°)')
grid