SciPy

scipy.signal.zpk2tf

scipy.signal.zpk2tf(z, p, k)[source]

Return polynomial transfer function representation from zeros and poles

Parameters:

z : ndarray

Zeros of the transfer function.

p : ndarray

Poles of the transfer function.

k : float

System gain.

Returns:

b : ndarray

Numerator polynomial.

a : ndarray

Denominator polynomial.

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