Select indices of the top-n highest values

Utility function returning indices of the top-n elements in a numeric vector. Ties are broken randomly.

Usage

topn(x, n)

Arguments

x

A numeric vector.

n

Number of top elements to select. If n > length(x), all indices are returned.

Value

An integer vector of indices corresponding to the top-n elements in x.

Examples

x <- c(5, 1, 3, 9, 7)
topn(x, 3)
#> [1] 1 4 5