Visualising filters (BodePlot)¶

Any time-domain or Fourier-domain filters can be visualised using the Bode plot, showing the magnitude (in decibels) and phase (in degrees) response of a linear time-invariant filter. The BodePlot allows for simple display of these responses for any filter, for example a 40-1000 Hertz band-pass filter:

>>> from gwpy.signal.filter_design import bandpass
>>> from gwpy.plot import BodePlot
>>> zpk = bandpass(40, 1000, 4096, analog=False)
>>> plot = BodePlot(zpk, analog=False, sample_rate=4096, title='40-1000 Hz bandpass filter')
>>> plot.show()

(png)