Displaying 1 result from an estimated 1 matches for "electrogamnetic".
2006 Nov 27
2
NaN with ccf() for vector with all same element
hello,
i have been using ccf() to look at the correlation between lightning and electrogamnetic data. for the most part it has worked exactly as expected. however, i have come across something that puzzles me a bit:
> x <- c(1, 0, 1, 0, 1, 0)
> y <- c(0, 0, 0, 0, 0, 0)
> ccf(x, x, plot = FALSE)
Autocorrelations of series 'X', by lag
-4 -3 -2 -1 0...