Nyquist representation of a complex transfer function matrix

Question

Enterprixe 2017-4-24

0
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https://ww2.mathworks.cn/matlabcentral/answers/337082-nyquist-representation-of-a-complex-transfer-function-matrix

编辑： David Ding 2017-4-27

Hello, i am trying to get this particular representation of a complex transfer function matrix. The problem is, as i am working with a symbolic varible, i do not how to fit the good input argument into the nyquist() function. Here is my program.

   for i=1:10
    gamma(i)=-real(s(i))/wo(i);
end
for l=1:10
    D(l,l)=(wo(l)^2-w^2+2*gamma(l)*wo(l)*w);
end
H=subs(Z*inv(D)*conj(Z)');
w=0:1:12;
nyquist(subs(H(1,1)),w);

Where wo and gamma are real numbers and Z is a 10x10 matrix with complex numbers. The transfer function is named by H and the symbolic variable is w and from this point i do not know what else to do to get this representation.