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scipy.signal.zpk2tf

scipy.signal.zpk2tf(z, p, k)

Return polynomial transfer function representation from zeros and poles

Parameters:

z : array_like

Zeros of the transfer function.

p : array_like

Poles of the transfer function.

k : float

System gain.

Returns:

b : ndarray

Numerator polynomial coefficients.

a : ndarray

Denominator polynomial coefficients.