pyActigraphy.light.LightMetricsMixin.filter_butterworth¶
- LightMetricsMixin.filter_butterworth(fc_low, fc_high, N, channels=None)[source]¶
Butterworth filtering
Forward-backward digital filtering using a Nth order Butterworth filter
- Parameters
fc_low (float) – Critical frequency (lower).
fc_high (float) – Critical fequency (higher).
N (int) – Order of the filter
channels (list of str, optional.) – Channel list. If set to None, use all available channels. Default is None.
- Returns
filt – Filtered signal, per channel.
- Return type
pd.DataFrame
Notes
This function is essentially a wrapper to the scipy.signal.butter function. For more information, see [1].
References