[C,R] = acf(X)
[C,R] = acf(X,Dates,...)
X [ tseries ] - Tseries object.
Dates [ numeric | Inf ] - Dates or date range on which tseries data will be used.
C [ numeric ] - Auto-/cross-covariance matrices.
R [ numeric ] - Auto-/cross-correlation matrices.
'demean=' [ true | false ] - Remove mean from the data before computing the ACF.
'order=' [ numeric | 0 ] - Order up to which the ACF will be computed.
'smallSample=' [ true | false ] - Adjust degrees of freedom for small samples.