Stationarity Diagnostics

These functions need the optional diagnostics extra:

pip install "impulso[diagnostics]"

adf_test	Augmented Dickey-Fuller (ADF) unit-root test, one series at a time.
kpss_test	Kwiatkowski-Phillips-Schmidt-Shin (KPSS) stationarity test.
johansen_test	Johansen cointegration rank test.
integration_order	Determine each series' integration order by repeated differencing.