What's the difference between two command?
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Hello,
In general, the command of nyquist plot is nyquist(sys,omega), but an example of textbook the command of nyquist is nyquist(A,B,K,0,1,w), where (A,B : matrices from state space equation, K : control gain, w : frequency range).
What's the difference between the two commands?
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Paul
2024-1-27
That's the old, obsolete form of nyquist() that was used for state space models before the Control System Toolbox introduced lti objects like ss and tf.
f = which('nyquist','-all')
dbtype(f{1},'35:58')
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Sam Chak
2024-1-27
The original Nyquist code was written in 1985.
% J.N. Little 10-11-85
% Revised ACWG 8-15-89, CMT 7-9-90, ACWG 2-12-91, 6-21-92,
% AFP 2-23-93, 10-1-94
% Copyright 1986-2003 The MathWorks, Inc.
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