Get Last Elements of a Vector

Extract the last elements of a vector.

Usage

last(x, length.out = 1, na.rm = FALSE)

Arguments

x: any vector.
length.out: integer indicating how many element are desired. If positive, return the length.out last elements of x; if negative, the last length.out elements are dropped.
na.rm: logical indicating if the last non-missing value (if any) shall be returned. By default (it is FALSE and) the last elements (whatever its values) are returned.

Value

a vector of length abs(length.out) of last values from x.

Author

Werner Stahel (stahel@stat.math.ethz.ch), and independently, Philippe Grosjean (phgrosjean@sciviews.org), Frédéric Ibanez (ibanez@obs-vlfr.fr).

Note

This function may eventually be deprecated for the standard R function tail().

Useful for the turnogram() function in package pastecs.

Examples

a <- c(NA, 1, 2, NA, 3, 4, NA)
last(a)
#> [1] NA
last(a, na.rm=TRUE)
#> [1] 4

last(a, length = 2)
#> [1]  4 NA
last(a, length = -3)
#> [1] NA  1  2 NA