eelbrain.Butterworth

class eelbrain.Butterworth(low, high, order, sfreq=None)

Butterworth filter

Parameters

• low (scalar) – Low cutoff frequency.

• high (scalar | None) – High cutoff frequency.

• order (int) – Filter order.

• sfreq (scalar) – Downsample filtered signal to this sampling frequency.

Notes

Uses scipy.signal.butter().

Methods

filter(ndvar)	Filter an NDVar
filtfilt(ndvar)	Forward-backward filter an NDVar