miscset (version 1.0.0)

duplicates: Determine Duplicates

Description

Determine duplicates. duplicates returns a logical vector, duplicatei an integer vector.

Usage

duplicates(x)
duplicatei(x, first = TRUE)

Arguments

x

A vector or data.frame to search for duplicates.

first

Logical, TRUE to return the index also for the first occurrence of values. Otherwise, a 0 is the index for the first occurrence.

Value

• duplicates returns a logical vector as duplicated, but with TRUE values also for the first occurrence of duplicated values. duplicatei returns the index of the first occurrence of each unique value.

Examples

#

x <- c(7, 7, 7, 2, 3, 2)
data.frame(
  data = x,
  duplicated = duplicated(x),
  duplicates = duplicates(x),
  duplicatei = duplicatei(x),
  duplicatei0 = duplicatei(x, FALSE))

#