Determine Duplicate Elements of integer64

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.

# S3 method for class '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)

• orderdup (memory saving ordering).

See also

duplicated(), unique.integer64()

Examples

x <- as.integer64(sample(c(rep(NA, 9), 1:9), 32, TRUE))
duplicated(x)
#>  [1] FALSE  TRUE  TRUE  TRUE  TRUE FALSE FALSE  TRUE FALSE  TRUE  TRUE  TRUE
#> [13] FALSE FALSE FALSE FALSE  TRUE  TRUE  TRUE  TRUE  TRUE FALSE FALSE  TRUE
#> [25]  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE

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