bit64 (version 4.0.5)

duplicated.integer64: Determine Duplicate Elements of integer64

Description

duplicated() determines which elements of a vector or data frame are duplicates of elements with smaller subscripts, and returns a logical vector indicating which elements (rows) are duplicates.

Usage

# S3 method for integer64
duplicated(x, incomparables = FALSE, nunique = NULL, method = NULL, …)

Arguments

x

a vector or a data frame or an array or NULL.

incomparables

ignored

nunique

NULL or the number of unique values (including NA). Providing nunique can speed-up matching when x has no cache. Note that a wrong nunique can cause undefined behaviour up to a crash.

method

NULL for automatic method selection or a suitable low-level method, see details

…

ignored

Value

duplicated(): a logical vector of the same length as x.

Details

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

Suitable methods are hashdup (hashing), sortorderdup (fast ordering) and orderdup (memory saving ordering).

See Also

duplicated, unique.integer64

Examples

# NOT RUN {
x <- as.integer64(sample(c(rep(NA, 9), 1:9), 32, TRUE))
duplicated(x)

stopifnot(identical(duplicated(x),  duplicated(as.integer(x))))
# }

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