Why does the Bode function behaves differently in a subplot?
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Hi,
I want to run a script several times in a row, where every run new lines are plotted in a Bode diagram. This does not work when I use subplots, see the simple example below. Both lines are plotted this way, but the first line disappears when the 2 lines are uncommented and the example is rerun. So how can I plot these 2 lines in 1 Bode subplot? Thank you in advance!
Best regards, Laszlo
H = tf([1],[100]);
figure(100)
% subplot(2,1,1)
hold on
bodemag(H)
grid on
defcol
H = tf([1],[1 0 0]);
figure(100)
% subplot(2,1,1)
hold on
bodemag(H)
grid on
defcol
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回答(2 个)
Arkadiy Turevskiy
2015-1-5
This works:
H = tf([1],[100]);
figure(100)
subplot(2,1,1);
[mag,ph,wout]=bode(H);
semilogx(wout,20*log10(squeeze(mag)));
grid on
xlabel('Frequency (rad/sec)');
ylabel('Magnitude (dB)');
title('Bode Diagram');
hold on;
H = tf([1],[1 1 0]);
figure(100)
subplot(2,1,1)
[mag,ph,wout]=bode(H);
semilogx(wout,20*log10(squeeze(mag)));
Thorsten
2014-12-15
This litte script works for me; maybe something unexpected is going on in your bodemag function?
function plotdata(s)
figure(100)
subplot(2,1,1)
hold on
plot(1:10, s*rand(1,10), 'k')
grid on
figure(100)
subplot(2,1,1)
hold on
plot(1:10, s*rand(1,10), 'r')
grid on
3 个评论
Thorsten
2014-12-15
I don't have the System Identification TB, so I have to ask if this works for you:
bodemag(gca, H)
另请参阅
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