cogpy.preprocess.filtering.temporal

Temporal IIR filters and decimation for xarray signals.

Butterworth bandpass/lowpass/highpass, notch, and polyphase decimation. All functions accept xarray.DataArray with an fs coordinate.

Functions

bandpassx(sigx, wl, wh, order, axis)	Butterworth bandpass filter (zero-phase, SOS form).
butterworth_bandpass_shoulder(x, fs, low, high)	Butterworth bandpass filter with shoulder specification (zero-phase).
decimatex(sigx, *[, factor, time_dim, ...])	Decimate along time_dim and update the time coordinate and fs.
highpassx(sigx, wh, order, axis)	Butterworth highpass filter (zero-phase).
lowpassx(sigx, wl, order, axis)	Butterworth lowpass filter (zero-phase).
notchesx(sigx, *, freqs[, Q, time_dim])	Apply multiple IIR notches along time_dim using zero-phase filtering.
notchx(sigx, *[, w0, Q, time_dim])	Notch filter (IIR notch) applied along time_dim using zero-phase filtering.