bandstop(data, freqmin, freqmax, df, corners=4, zerophase=False)[source]

Butterworth-Bandstop Filter.

Filter data removing data between frequencies freqmin and freqmax using corners corners. The filter uses scipy.signal.iirfilter() (for design) and scipy.signal.sosfilt() (for applying the filter).

  • data (numpy.ndarray) Data to filter.
  • freqmin Stop band low corner frequency.
  • freqmax Stop band high corner frequency.
  • df Sampling rate in Hz.
  • corners Filter corners / order.
  • zerophase If True, apply filter once forwards and once backwards. This results in twice the number of corners but zero phase shift in the resulting filtered trace.

Filtered data.