Bodeplot a transfer function around resonant frequency (with zero damp)

Hi, all

 I am trying to plot bode diagram of transfer:

( 200 s^2 + s + 2.842e007)/( s^2 + 1e6 )

but what I got looks weird around my resonant frequency, 1e3 rad/s , and I think maybe caused by frequency step. I want to have a closer frequency step around this particular frequency to have a smoother curve, is there any parameter to set this?

I have checked getoption and setoption command, that's not what I need.

Thanks for any suggestion.

Answer 1

[Paulo Silva]

tfuc=tf([200 1 2.842e007],[1 0 1e6]);
v=logspace(2,4,10000);
bode(tfuc,v)

It was indeed related to the frequency step.

[fee woo]

Hi, Paulo

Thanks for such a quick response! Indeed what I needed.