R: Sample Ranks

rank {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)

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