rank                  package:base                  R Documentation

Sample Ranks

Description:

     Returns the sample ranks of the values in a numeric vector. Ties
     result in ranks being averaged.

Usage:

     rank(x, na.last = TRUE)

Arguments:

       x: a numeric vector.

 na.last: for controlling the treatment of `NA's. If `TRUE', missing
          values in the data are put last; if `FALSE', they are put
          first; if `NA', they are removed.

See Also:

     `order' and `sort'.

Examples:

     (r1 <- rank(x1 <- c(3,1,4,59,26)))
     (r2 <- rank(x2 <- c(3,1,4,5,9,2,6,5,3,5))) # ties

     ## rank() is "idempotent": rank(rank(x)) == rank(x) :
     stopifnot(rank(r1) == r1, rank(r2) == r2)

