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.

Details:

     'is.object' is generic: you can write methods to handle specific
     classes of objects, see InternalMethods.

See Also:

     'class', and 'methods'.

Examples:

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

