Analogous function for lead and lag in dplyr by
wrapping data.table's shift.
lead(x, n = 1L, fill = NA) lag(x, n = 1L, fill = NA)
| x | A vector |
|---|---|
| n | a positive integer of length 1, giving the number of positions to lead or lag by. Default uses 1 |
| fill | Value to use for padding when the window goes beyond the input length.
Default uses |
A vector
lead(1:5)#> [1] 2 3 4 5 NAlag(1:5)#> [1] NA 1 2 3 4lead(1:5,2)#> [1] 3 4 5 NA NAlead(1:5,n = 2,fill = 0)#> [1] 3 4 5 0 0