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# scipy.signal.ss2tf

`scipy.signal.``ss2tf`(A, B, C, D, input=0)

  State-space to transfer function.

  Parameters : | A, B, C, D : ndarray State-space representation of linear system. input : int, optional For multiple-input systems, the input to use.
  Returns : | num, den : 1D ndarray Numerator and denominator polynomials (as sequences) respectively.

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