I've created a dataframe containing multiple ACF lists through the command

rev.acf<-apply(rev.matrix, 2, acf, na.action=na.contiguous, lag.max=12, plot=FALSE)

where rev.matrix is an n by t matrix containing n time series in columns.  I'd now like to pull out only the ACF information and store it in a seperate n by 12 matrix.  So far the only way I can work out to access this is 

rev.acf[["series1"]][["acf"]]
rev.acf[["series2"]][["acf"]]
etc

Is there some way I can do this automatically?

Thanks
Murray





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