is.object                package:base                R Documentation

Is an Object ``internally classed''?

Description:

     A function rather for internal use.  It returns `TRUE' if the
     object `x' has the R internal `OBJECT' attribute set, and `FALSE'
     otherwise.

Usage:

     is.object(x)

Arguments:

       x: object to be tested.

See Also:

     `class', and `methods'.

Examples:

     is.object(1) # FALSE
     is.object(as.factor(1:3)) # TRUE

