Force virtual groups to become explicit rows

When collect() is used on a percentiled_df, the virtual groups are made explicit.

collect.percentiled_df(x, ..., id = NULL, original_id = NULL)

Arguments

x	A percentiled_df.
...	Not used.
id	Optional. A single character that specifies a name for a column containing a sequence from 1:n for each group.
original_id	Optional. A single character that specifies a name for a column containing the original position of the row.

Examples

library(dplyr)
#> 
#> Attaching package: ‘dplyr’
#> The following object is masked from ‘package:testthat’:
#> 
#>     matches
#> The following objects are masked from ‘package:stats’:
#> 
#>     filter, lag
#> The following objects are masked from ‘package:base’:
#> 
#>     intersect, setdiff, setequal, union

# virtual groups become real rows
collect(percentify_cut(mtcars, mpg, c(0.5)))
#> # A tibble: 34 x 12
#> # Groups:   .percentile_mpg [2]
#>    .percentile_mpg   mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear
#>    <chr>           <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#>  1 0%-50%           18.7     8  360    175  3.15  3.44  17.0     0     0     3
#>  2 0%-50%           18.1     6  225    105  2.76  3.46  20.2     1     0     3
#>  3 0%-50%           14.3     8  360    245  3.21  3.57  15.8     0     0     3
#>  4 0%-50%           19.2     6  168.   123  3.92  3.44  18.3     1     0     4
#>  5 0%-50%           17.8     6  168.   123  3.92  3.44  18.9     1     0     4
#>  6 0%-50%           16.4     8  276.   180  3.07  4.07  17.4     0     0     3
#>  7 0%-50%           17.3     8  276.   180  3.07  3.73  17.6     0     0     3
#>  8 0%-50%           15.2     8  276.   180  3.07  3.78  18       0     0     3
#>  9 0%-50%           10.4     8  472    205  2.93  5.25  18.0     0     0     3
#> 10 0%-50%           10.4     8  460    215  3     5.42  17.8     0     0     3
#> # … with 24 more rows, and 1 more variable: carb <dbl>