pyhctsa.operations.correlation.partial_autocorr¶

pyhctsa.operations.correlation.partial_autocorr(y, max_tau=10, what_method='ols')¶

Compute the partial autocorrelation of an input time series.

This function calculates the partial autocorrelation function (PACF) up to a specified lag using either ordinary least squares or Yule-Walker equations.

Parameters:¶

y : array-like¶

The input time series.

max_tau : int, optional¶

Maximum time-delay to compute PACF values for. Default is 10.

method : {'ols', 'yule-walker'}, optional

Method to compute partial autocorrelation:

• 'ols': Ordinary least squares regression.

• 'yule-walker': Yule-Walker equations method.

Default is 'ols'.

what_method : str¶

Returns:¶

Dictionary containing partial autocorrelations for each lag, with keys:

• ’pac_1’: PACF at lag 1

• ’pac_2’: PACF at lag 2

…up to maxTau

Return type:¶

dict