[Octave-bug-tracker] [bug #63393] [octave forge] (control) Bode plot problem. Different results between MATLAB and Octave.

[Torsten Lilge]

Follow-up Comment #13, bug #63393 (project octave):

I can confirm the issue from comment #12. Besides the numerical errors leading
to the "noise", the phase plot is different between 400 and 1000 rad/s
compared to the result from Matlab. However, this effect disappears if you
select another range of frequencies, like, e.g. 


freq = logspace(0,5,10000);


The poles (and most of the zeros) of the systems are all very close to 1,
which might be the cause of the numerical problems in Octave. What results do
you get when you discretize the original continuous-time system with a larger
sampling time?


    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?63393>

_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/