bit64 (version 4.8.4)

tiepos: Extract Positions of Tied Elements

Description

tiepos returns the positions of those elements that participate in ties.

Usage

tiepos(x, ...)
# S3 method for integer64
tiepos(x, nties = NULL, method = NULL, ...)

Value

an integer vector of positions

Details

This function automatically chooses from several low-level functions considering the size of x and the availability of a cache.

Suitable methods are

• sortordertie (fast ordering)

• ordertie (memory saving ordering).

See Also

rank.integer64() for possibly tied ranks and unipos.integer64() for positions of unique values.

Examples

x <- as.integer64(sample(c(rep(NA, 9), 1:9), 32, TRUE))
tiepos(x)

stopifnot(identical(tiepos(x),  (1:length(x))[duplicated(x) | rev(duplicated(rev(x)))]))