Can I zoom an area in Bode magnitude diagram?
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Muna Shehan
am 18 Jul. 2017
Kommentiert: Star Strider
am 18 Jul. 2017
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
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Star Strider
am 18 Jul. 2017
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.
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Star Strider
am 18 Jul. 2017
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
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