Keep non-unique rows in a data frame

Keeps only non-unique rows within a data frame.

Usage

duplicates(.data, ..., .keep_all = TRUE)

Arguments

.data

A data.frame.

...

Optional variables to use when determining non-uniqueness. If omitted, will use all variables in the data frame.

.keep_all

A flag specifying whether to keep all variables in .data.

Value

The original data frame with only non-unique rows.

Examples

data <- tibble::tibble(x = c(1, 2, 1, 1), y = c(1, 1, 1, 5))

duplicates(data)
#> # A tibble: 2 × 2
#>       x     y
#>   <dbl> <dbl>
#> 1     1     1
#> 2     1     1
duplicates(data, x)
#> # A tibble: 3 × 2
#>       x     y
#>   <dbl> <dbl>
#> 1     1     1
#> 2     1     1
#> 3     1     5
duplicates(data, y)
#> # A tibble: 3 × 2
#>       x     y
#>   <dbl> <dbl>
#> 1     1     1
#> 2     2     1
#> 3     1     1
duplicates(data, x, y)
#> # A tibble: 2 × 2
#>       x     y
#>   <dbl> <dbl>
#> 1     1     1
#> 2     1     1
duplicates(data, y, .keep_all = FALSE)
#> # A tibble: 3 × 1
#>       y
#>   <dbl>
#> 1     1
#> 2     1
#> 3     1