statsmodels.tsa.tests.test_stattools.pacf_yw¶

statsmodels.tsa.tests.test_stattools.pacf_yw(x, nlags=40, method='unbiased')[source]¶

Partial autocorrelation estimated with non-recursive yule_walker

Parameters:

x : 1d array

observations of time series for which pacf is calculated

nlags : int

largest lag for which pacf is returned

method : ‘unbiased’ (default) or ‘mle’

method for the autocovariance calculations in yule walker

Returns:

pacf : 1d array

partial autocorrelations, maxlag+1 elements

Notes

This solves yule_walker for each desired lag and contains currently duplicate calculations.