I am able to use statsmodels.graphics.tsaplots.plot_acf to get a plot of the acf’s for a specific list of lags, as the lags input accepts a list of values. I would like to have the raw data of the acf’s, and thus want to use statsmodels.tsa.stattools.acf, however this does not have a parameter lags. Instead, it seems to force me to compute the acf for all lags up to some value nlag, which is very inefficient for large data sets where I want to look at large lags. Is there a way to get the acf for a specific list of lags?