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

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

Answer 1

[venkat vasu]

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

[Janamejaya]

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]

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]

This doesn't work, the bode overwrites the semilogx.