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 x 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 x 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]>