is.object

A function rather for internal use. It returns TRUE if the object x has the R internal OBJECT bit set, and FALSE otherwise. The OBJECT bit is set when a "class" attribute is added and removed when that attribute is removed, so this is a very efficient way to check if an object has a class attribute. (S4 objects always should.)

Syntax

R Copy

is.object(x)

Arguments

Parameter	Description
x	object to be tested.

Examples

Example

R Copy

# NOT RUN {
is.object(1) # FALSE
is.object(as.factor(1:3)) # TRUE
# }

See Also

class and methods. isS4.