Finding lag at which cross correlation is maximum ccf( )

Question

I have 2 time series and I am using ccf to find the cross correlation between them. ccf(ts1, ts2) lists the cross-correlations for all time lags. How can I find the lag which results in maximum correlation without manually looking at the data?

Answer 1

Posting the answer http://r.789695.n4.nabble.com/ccf-function-td2288257.html

Find_Max_CCF<- function(a,b)
{
 d <- ccf(a, b, plot = FALSE)
 cor = d$acf[,,1]
 lag = d$lag[,,1]
 res = data.frame(cor,lag)
 res_max = res[which.max(res$cor),]
 return(res_max)
}