rray_reverse() reverses the order of the elements of x along one or more
axes.
Arguments
- x
An array.
- ...
These dots are for future extensions and must be empty.
- axes
The axes to reverse along, given by position or by title.
Details
Names on a reversed axis move with the data. Every other axis keeps its names
untouched. The titles of x are kept.
Examples
rray_reverse(1:5, axes = 1)
#> [1] 5 4 3 2 1
x <- matrix(1:6, nrow = 2, dimnames = list(c("r1", "r2"), c("a", "b", "c")))
# Reverse the rows, names move with the data
rray_reverse(x, axes = 1)
#> a b c
#> r2 2 4 6
#> r1 1 3 5
# Reverse the columns
rray_reverse(x, axes = 2)
#> c b a
#> r1 5 3 1
#> r2 6 4 2
# Reverse both axes
rray_reverse(x, axes = c(1, 2))
#> c b a
#> r2 6 4 2
#> r1 5 3 1
# Reverse the columns, by title
y <- rray_set_titles(x, c("row", "col"))
rray_reverse(y, axes = "col")
#> col
#> row c b a
#> r1 5 3 1
#> r2 6 4 2