MATLAB: How to define transfer function into the tf or ss format

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If a transfer function is given like Lt(s) = F*(s*I-A)^(-1)*B, how to get its relative tf() or ss() format so that bodeplot or nyquist can be used? Thx.

Best Answer

sys=ss(A,B,C,0);
bode(sys);
nyquist(sys);
HTH. Arkadiy
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