How can I plot the magnitude and phase Bode diagrams (of an SISO model) asis shown in bode function?

All the answers I saw has not answered the question, and I spent an entire day just to show those diagrams.

I have troubles especially in transforming the x axis as is used in bode and bodemag plots.

In my implementation I just get frequencies going from 1 to one.

[Paul]

Hi Bogdan -Ervin,

Can you show a simple example, with code, that illustrates the plot you're making and then explaining how you'd like it to look?

Answer 1

[Ranjeet]

Hi Bogdan,

I would suggest you the following link to get started with bode plots of a SISO system.

Bode plot example: SISO system

Also, I would suggest you see the following example to plot for specified frequency range –

Bode plot at specified frequencies

For example, you can change the following code snippet

H = tf([-0.1,-2.4,-181,-1950],[1,3.3,990,2600]);
bode(H,{1,100})
grid on

to

H = tf([-0.1,-2.4,-181,-1950],[1,3.3,990,2600]);
bode(H,{1,1000})
grid on

to change the frequency range between 1 and 1000 Hz. Here, final frequency has been changed from 100 to 1000.