How to obtain Two bode plots on the same figure (overlapping)??

2012 7 30
1 个回答
更新时间：2016 3 1
2 次查看（30 天）

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Dear All,
I want to plot an array of data (code1) and a bode plot (code2) on the same graph/plot. Though i am able to get the individual semilog graphs(when i individually run them), i have been unsuccessful in obtaining both the plots on a single graph.
I would be extremely grateful, if someone could help me out. Thanks.
code1 :
semilogx([10 100 200 300 400 500 600 700 800 900 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 ], [2 2.3 13.3 26.3 -6.46 -11.7 -15.6 -18.8 -20.9 -23.4 -25.2 -37.9 -44.8 -50 -53.9 -57 -59.6 -62 -64 -65 ]);
code2 :
num=[0 1];
den=[0.000000495 0.000033 1];
system1=tf(num,den);
bode(system1)
best wishes
janmay

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回答（1 个）

venkat vasu
venkat vasu 2012-7-30
编辑：Walter Roberson 2012-7-30

0 个投票

subplot(1,2,1);
plot(code1);
subplot(1,2,2);
plot(code2);

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Janamejaya
Janamejaya 2012-7-30
编辑：Walter Roberson 2012-7-30
Thanks for the quick reply venkat, but i am looking for an overlapping/single plot. Much like this:
num=[0 1];
den=[0.000000495 0.000033 1];
system1=tf(num,den);
num=[0 1];
den=[0.000000495 0.000033 0.5];
system2=tf(num,den);
bode(system1, system2)
But what i want is my two sets of data and a bode plot in a single graph, not a subplot.
Best wishes
janmay
Janamejaya
Janamejaya 2012-7-30
编辑：Walter Roberson 2012-7-30
I was able to solve the problem, a Prof. at my university helped me.
Here's the code.
semilogx([10 100 200 300 400 500 600 700 800 900 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 ], [2 2.3 13.3 26.3 -6.46 -11.7 -15.6 -18.8 -20.9 -23.4 -25.2 -37.9 -44.8 -50 -53.9 -57 -59.6 -62 -64 -65 ]);
hold on
num=[0 1];
den=[0.000000495 0.000033 1];
system1=tf(num,den);
bode(system1)
best wishes
janmay
Patricia Darling
Patricia Darling 2016-3-1
This doesn't work, the bode overwrites the semilogx.

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