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.
duplicated(): a logical vector of the same length as x.
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
Details
This function automatically chooses from several low-level functions
considering the size of x and the availability of a cache.