How can i plot a transfer function

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Hello, im trying to plot this transfer function but somehow i dont know exactly what is failing, here is what im trying:

syms s
D=[2+s^2 -1 0;-1 s^2+2+s*0.5*10/(s+10) -1;0 -1 2+s^2];
H=inv(D);
H11r=H(1,1)
H22r=H(2,2)
H33r=H(3,3)
s=0:0.01:5;
plot(s,H11r)

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Star Strider 2017-3-11

Please explain in a bit more detail what you want to do.

I do not understand ‘H’. What are you doing?

Do you have the Control System Toolbox?

Enterprixe 2017-3-11

Yes, i have Control System Toolbox. H is just the way to call what is the 'transfer matrix' of my system. What i want is to plot the terms on the diagonal of that matrix and in this case i used the H(1,1) one because i supose that knowing how to represent that will carry me to represent the rest without problem.

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