This function is defunct and has been replaced by map_depth()
.
See also modify_depth()
for a version that preserves the types of
the elements of the tree.
at_depth(.x, .depth, .f, ...)
A list or atomic vector.
Level of .x
to map on. Use a negative value to
count up from the lowest level of the list.
map_depth(x, 0, fun)
is equivalent to fun(x)
.
map_depth(x, 1, fun)
is equivalent to x <- map(x, fun)
map_depth(x, 2, fun)
is equivalent to x <- map(x, ~ map(., fun))
A function, formula, or vector (not necessarily atomic).
If a function, it is used as is.
If a formula, e.g. ~ .x + 2
, it is converted to a function. There
are three ways to refer to the arguments:
For a single argument function, use .
For a two argument function, use .x
and .y
For more arguments, use ..1
, ..2
, ..3
etc
This syntax allows you to create very compact anonymous functions.
If character vector, numeric vector, or list, it is
converted to an extractor function. Character vectors index by
name and numeric vectors index by position; use a list to index
by position and name at different levels. If a component is not
present, the value of .default
will be returned.
Additional arguments passed on to the mapped function.