ballet: ballet

In romainfrancois/dance: Tibble Dancing

Description

ballet() iterates on the groups, as identified by dplyr::group_rows()), and applies the choreography() to each group.

Usage

ballet(.tbl, ..., .env = caller_env())

Arguments

.tbl	A data frame
...	Description of the columns to create, see choreography() for details.
.env	parent environment of the function generated by choreography()

Details

The grouping structure of .tbl defines the number of groups n_groups and the formulas in ... gives the number of dance moves n_moves

Value

a list of 2 elements

• ptypes : a list of n_moves types, in the sense of the .ptype argument to vctrs::vec_c()

• steps : a list of n_groups results, each of size n_moves

Examples

data <- iris %>%
  group_by(Species)

# most dance functions get the result of ballet()
# and then process it
c(ptypes, steps) %<-%
  ballet(data,
    Sepal.Length = ~mean(Sepal.Length),
    Sepal.Width  = ~mean(Sepal.Width)
  )
ptypes
steps

purrr::transpose(steps)
purrr::map_dbl(steps, 1)
purrr::map_dbl(steps, 2)

romainfrancois/dance documentation built on Nov. 21, 2019, 11:49 a.m.