named_group_split.R

library(dplyr, warn.conflicts = FALSE)
library(purrr)

named_group_split <- function(...) {
  data <- group_by(...)
  
  names <- group_keys(data) %>% 
    map(as.character) %>% 
    reduce(paste, sep = "~~")
  
  group_split(data) %>% 
    set_names(names)
}

named_group_split(mtcars, cyl, am)
#> $`4~~0`
#> # A tibble: 3 x 11
#>     mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>   <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1  24.4     4  147.    62  3.69  3.19  20       1     0     4     2
#> 2  22.8     4  141.    95  3.92  3.15  22.9     1     0     4     2
#> 3  21.5     4  120.    97  3.7   2.46  20.0     1     0     3     1
#> 
#> $`4~~1`
#> # A tibble: 8 x 11
#>     mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>   <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1  22.8     4 108      93  3.85  2.32  18.6     1     1     4     1
#> 2  32.4     4  78.7    66  4.08  2.2   19.5     1     1     4     1
#> 3  30.4     4  75.7    52  4.93  1.62  18.5     1     1     4     2
#> 4  33.9     4  71.1    65  4.22  1.84  19.9     1     1     4     1
#> 5  27.3     4  79      66  4.08  1.94  18.9     1     1     4     1
#> 6  26       4 120.     91  4.43  2.14  16.7     0     1     5     2
#> 7  30.4     4  95.1   113  3.77  1.51  16.9     1     1     5     2
#> 8  21.4     4 121     109  4.11  2.78  18.6     1     1     4     2
#> 
#> $`6~~0`
#> # A tibble: 4 x 11
#>     mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>   <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1  21.4     6  258    110  3.08  3.22  19.4     1     0     3     1
#> 2  18.1     6  225    105  2.76  3.46  20.2     1     0     3     1
#> 3  19.2     6  168.   123  3.92  3.44  18.3     1     0     4     4
#> 4  17.8     6  168.   123  3.92  3.44  18.9     1     0     4     4
#> 
#> $`6~~1`
#> # A tibble: 3 x 11
#>     mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>   <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1  21       6   160   110  3.9   2.62  16.5     0     1     4     4
#> 2  21       6   160   110  3.9   2.88  17.0     0     1     4     4
#> 3  19.7     6   145   175  3.62  2.77  15.5     0     1     5     6
#> 
#> $`8~~0`
#> # A tibble: 12 x 11
#>      mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>    <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#>  1  18.7     8  360    175  3.15  3.44  17.0     0     0     3     2
#>  2  14.3     8  360    245  3.21  3.57  15.8     0     0     3     4
#>  3  16.4     8  276.   180  3.07  4.07  17.4     0     0     3     3
#>  4  17.3     8  276.   180  3.07  3.73  17.6     0     0     3     3
#>  5  15.2     8  276.   180  3.07  3.78  18       0     0     3     3
#>  6  10.4     8  472    205  2.93  5.25  18.0     0     0     3     4
#>  7  10.4     8  460    215  3     5.42  17.8     0     0     3     4
#>  8  14.7     8  440    230  3.23  5.34  17.4     0     0     3     4
#>  9  15.5     8  318    150  2.76  3.52  16.9     0     0     3     2
#> 10  15.2     8  304    150  3.15  3.44  17.3     0     0     3     2
#> 11  13.3     8  350    245  3.73  3.84  15.4     0     0     3     4
#> 12  19.2     8  400    175  3.08  3.84  17.0     0     0     3     2
#> 
#> $`8~~1`
#> # A tibble: 2 x 11
#>     mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>   <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1  15.8     8   351   264  4.22  3.17  14.5     0     1     5     4
#> 2  15       8   301   335  3.54  3.57  14.6     0     1     5     8