scipy.signal.band_stop_obj(wp, ind, passb, stopb, gpass, gstop, type)[source]

Band Stop Objective Function for order minimization.

Returns the non-integer order for an analog band stop filter.


wp : scalar

Edge of passband passb.

ind : int, {0, 1}

Index specifying which passb edge to vary (0 or 1).

passb : ndarray

Two element sequence of fixed passband edges.

stopb : ndarray

Two element sequence of fixed stopband edges.

gstop : float

Amount of attenuation in stopband in dB.

gpass : float

Amount of ripple in the passband in dB.

type : {‘butter’, ‘cheby’, ‘ellip’}

Type of filter.


n : scalar

Filter order (possibly non-integer).