rlang (version 0.1)

set_names: Set names of a vector

Description

This is equivalent to stats::setNames(), with more features and stricter argument checking.

Usage

set_names(x, nm = x, ...)

Arguments

x

Vector to name.

nm, ...

Vector of names, the same length as x.

You can specify names in the following ways:

• If you do nothing, x will be named with itself.

• If x already has names, you can provide a function or formula to transform the existing names. In that case, ... is passed to the function.

• If nm is NULL, the names are removed (if present).

• In all other cases, nm and ... are passed to chr(). This gives implicit splicing semantics: you can pass character vectors or list of character vectors indistinctly.

Examples

# NOT RUN {
set_names(1:4, c("a", "b", "c", "d"))
set_names(1:4, letters[1:4])
set_names(1:4, "a", "b", "c", "d")

# If the second argument is ommitted a vector is named with itself
set_names(letters[1:5])

# Alternatively you can supply a function
set_names(1:10, ~ letters[seq_along(.)])
set_names(head(mtcars), toupper)

# `...` is passed to the function:
set_names(head(mtcars), paste0, "_foo")
# }