lfiltic(b, a, y, x=None)
Given a linear filter (b, a) and initial conditions on the output y and the input x, return the initial conditions on the state vector zi which is used by lfilter
to generate the output given the input.
Linear filter term.
Linear filter term.
Initial conditions.
If N = len(a) - 1
, then y = {y[-1], y[-2], ..., y[-N]}
.
If y is too short, it is padded with zeros.
Initial conditions.
If M = len(b) - 1
, then x = {x[-1], x[-2], ..., x[-M]}
.
If x is not given, its initial conditions are assumed zero.
If x is too short, it is padded with zeros.
The state vector zi = {z_0[-1], z_1[-1], ..., z_K-1[-1]}
, where K = max(M, N)
.
Construct initial conditions for lfilter given input and output vectors.
The following pages refer to to this document either explicitly or contain code examples using this.
scipy.signal._signaltools.sosfilt
scipy.signal._signaltools.lfilter
scipy.signal._signaltools.lfilter_zi
scipy.signal._signaltools.filtfilt
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