mStats (version 3.4.0)

duplicates: Report, tag or drop the duplicate observations

Description

duplicates() generates a table showing the duplicate Observations as one or more copies as well as their Surplus indicating the second, third, ... copy of the first of each group of duplicates.

Usage

duplicates(data, ..., drop = FALSE)

Arguments

data

data.frame

...

variables to find the duplicate observations

drop

TRUE deletes all the duplicate observations.

Value

data.frame with a column dup_num, indicating the number of duplicate observations of each group of observations

Details

If no variable is specified in ..., all variables are used to find the duplicate observations.

If drop is set to TRUE, all occurrences of each group of observations except the first are deleted from the dataset.

Examples

# NOT RUN {
x <- duplicates(iris, Species)
x <- duplicates(iris)

# }