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=True)
plot = BodePlot(zpk, analog=True, title='40-1000\,Hz bandpass filter')
plot.show()

(png)