Add a Class to an Object

Utility to add (prepend) a class(es) to existing objects.

Usage

addClass(x, class)

Arguments

x

The object to receive new class(es).

class

Character. The name of additional class(es).

Value

An object with new classes.

See also

class(), typeof(), structure()

Author

Stu Field

Examples

class(iris)
#> [1] "data.frame"

addClass(iris, "new") |> class()
#> [1] "new"        "data.frame"

addClass(iris, c("A", "B")) |> class()    # 2 classes
#> [1] "A"          "B"          "data.frame"

addClass(iris, c("A", "data.frame")) |> class()    # no duplicates
#> [1] "A"          "data.frame"

addClass(iris, c("data.frame", "A")) |> class()    # re-orders if exists
#> [1] "data.frame" "A"