Bode Plot Transfer Function

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Joseph Mohane
Joseph Mohane 2018-10-5
评论： Joseph Mohane 2018-10-5
Hi Friends,
How do I only plot the magnitude of a transfer function something like this.
s^4 + s^2 + 1
------------------------------------------
s^4 + 2 s^3 +3 s^2 + 4 s + 1
I am interesting in seeing the magnitude plot only.Thank you.

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Dimitris Kalogiros
Dimitris Kalogiros 2018-10-5
Here you are:
close all
clearvars
s=tf('s')
H=(s^4+s^2+1)/(s^4+2*s^3+3*s^2+4*s+1)
opts = bodeoptions('cstprefs');
opts.PhaseVisible = 'off';
bodeplot(H, opts );
grid on; zoom on;

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