flatten {purrr} | R Documentation |
These functions remove a level hierarchy from a list. They are similar to
unlist()
, only ever remove a single layer of hierarchy, and
are type-stable so you always know what the type of the output is.
flatten(.x) flatten_lgl(.x) flatten_int(.x) flatten_dbl(.x) flatten_chr(.x) flatten_dfr(.x, .id = NULL) flatten_dfc(.x)
.x |
A list of flatten. The contents of the list can be anything for
|
.id |
If not |
flatten()
returns a list, flatten_lgl()
a logical
vector, flatten_int()
an integer vector, flatten_dbl()
a
double vector, and flatten_chr()
a character vector.
flatten_dfr()
and flatten_dfc()
return data frames created by
row-binding and column-binding respectively. They require dplyr to
be installed.
x <- rerun(2, sample(4)) x x %>% flatten() x %>% flatten_int() # You can use flatten in conjunction with map x %>% map(1L) %>% flatten_int() # But it's more efficient to use the typed map instead. x %>% map_int(1L)