statsmodels.tsa.stattools.levinson_durbin_pacf¶

statsmodels.tsa.stattools.levinson_durbin_pacf(pacf, nlags=None)[source]¶

Levinson-Durbin algorithm that returns the acf and ar coefficients.

Parameters:¶

pacf : array_like¶

Partial autocorrelation array for lags 0, 1, … p.

nlags : int, optional¶

Number of lags in the AR model. If omitted, returns coefficients from an AR(p) and the first p autocorrelations.

Returns:¶

• arcoefs (ndarray) – AR coefficients computed from the partial autocorrelations.

• acf (ndarray) – The acf computed from the partial autocorrelations. Array returned contains the autocorrelations corresponding to lags 0, 1, …, p.

References