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[Octave-bug-tracker] [bug #53164] Incorrect Nyquist plot


From: Doug Stewart
Subject: [Octave-bug-tracker] [bug #53164] Incorrect Nyquist plot
Date: Thu, 15 Feb 2018 13:10:46 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36

Follow-up Comment #8, bug #53164 (project octave):

I see your point. here is one way to do it

s=tf('s')
 sys=.5/(s*(s+1)^2)
figure(1)
[ ~, ~, w]=nyquist(sys);
 nyquist(sys,w*.1)
 figure(2)
 bode(sys)

I will put it on my todo list and see why 
octave's nyquist shows only part of what matlab's
nyquist shows.


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