scipy.signal.tf2zpk¶
- scipy.signal.tf2zpk(b, a)[source]¶
Return zero, pole, gain (z,p,k) representation from a numerator, denominator representation of a linear filter.
Parameters : b : ndarray
Numerator polynomial.
a : ndarray
Denominator polynomial.
Returns : z : ndarray
Zeros of the transfer function.
p : ndarray
Poles of the transfer function.
k : float
System gain.
Notes
If some values of b are too close to 0, they are removed. In that case, a BadCoefficients warning is emitted.