Bode/Nyquist plot.....

[alexzkter]

Hi again, I didn't know f1 and f2 was the frequency range (rad/s). You typing [-1,1] and [-2,2] on some examples confused me since negative frequencies don't exist.

I've been trying to plot this:
   

and I got this:
       

But, I don't understand why the 'x' takes negative values, since that's the frequency axis. How am I supposed to read the frequency values, mate? Thanks in advance