Nest a Tibble By Groups

Nest a tibble data frame using grouping specification. Supports standard and non standard evaluation.

df_nest_by(data, ..., vars = NULL)

Arguments

data

a data frame

...

One or more unquoted expressions (or variable names) separated by commas. Used as grouping variables.

vars

a character vector containing the grouping variables of interest.

Value

A tbl with one row per unique combination of the grouping variables. The first columns are the grouping variables, followed by a list column of tibbles with matching rows of the remaining columns.

Examples

# Non standard evaluation
ToothGrowth %>%
 df_nest_by(dose, supp)
#> # A tibble: 6 × 3
#>   supp   dose data             
#>   <fct> <dbl> <list>           
#> 1 VC      0.5 <tibble [10 × 1]>
#> 2 VC      1   <tibble [10 × 1]>
#> 3 VC      2   <tibble [10 × 1]>
#> 4 OJ      0.5 <tibble [10 × 1]>
#> 5 OJ      1   <tibble [10 × 1]>
#> 6 OJ      2   <tibble [10 × 1]>

# Standard evaluation
ToothGrowth %>%
 df_nest_by(vars = c("dose", "supp"))
#> # A tibble: 6 × 3
#>   supp   dose data             
#>   <fct> <dbl> <list>           
#> 1 VC      0.5 <tibble [10 × 1]>
#> 2 VC      1   <tibble [10 × 1]>
#> 3 VC      2   <tibble [10 × 1]>
#> 4 OJ      0.5 <tibble [10 × 1]>
#> 5 OJ      1   <tibble [10 × 1]>
#> 6 OJ      2   <tibble [10 × 1]>