scipy.signal.ss2zpk

scipy.signal.ss2zpk(A, B, C, D, input=0)

State-space representation to zero-pole-gain representation.

A, B, C, D defines a linear state-space system with p inputs, q outputs, and n state variables.

Parameters

Aarray_like

State (or system) matrix of shape (n, n)

Barray_like

Input matrix of shape (n, p)

Carray_like

Output matrix of shape (q, n)

Darray_like

Feedthrough (or feedforward) matrix of shape (q, p)

inputint, optional

For multiple-input systems, the index of the input to use.

Returns

z, psequence

Zeros and poles.

kfloat

System gain.