The lpacf function computes the localized partial autocorrelation
of a locally stationary time series. The resultant object can be printed using
print.lpacf or plotted by plot.lpacf.
References
Killick, R., Knight, M. I., Nason, G.P. and Eckley, I. A. (2020)
The local partial autocorrelation function and some applications.
Electron. J. Statist.14 (2), 3268-3314.
DOI: 10.1214/20-EJS1748.