Get names for each axis of an array

rray_names() returns the names for each axis of an array, or NULL if x has no names at all. Unlike dimnames(), it returns a one-element list for named vectors.

Usage

rray_names(x)

Arguments

x

An array.

Value

Either:

• A list with length equal to the dimensionality of x, where each element is either a character vector of names or NULL.

• NULL if x has no names.

Examples

# No names at all
rray_names(1:3)
#> NULL
# Named vectors return a one-element list
rray_names(c(a = 1, b = 2))
#> [[1]]
#> [1] "a" "b"
#> 

# All dimension names
x <- array(1:6, c(2, 3), dimnames = list(c("r1", "r2"), c("c1", "c2", "c3")))
rray_names(x)
#> [[1]]
#> [1] "r1" "r2"
#> 
#> [[2]]
#> [1] "c1" "c2" "c3"
#>