Attributes of the Current Evaluation Frame
DESCRIPTION:
Returns a list of all the attributes of the current frame.
USAGE: 
frame.attr(which, n=NULL)
frame.attr(which, n=NULL) <- value
frame.attributes()
OPTIONAL ARGUMENTS:
which:
Name of the attribute.
n:
the evaluation frame in which to get or assign the attribute. By default, the current evaluation frame.
value:
Object to which the attribute should be set.
VALUE:
frame.attr returns the value of the attribute which of frame n. Frames can have attributes either from use of the assignment form of frame.attr in the same frame, or because the frame was created with attributes; e.g., because the definition of the function being called in the frame itself has attributes.
DETAILS:
frame.attributes returns the list of all the attributes of the current frame.
SEE ALSO:
new.frame .
EXAMPLES: 
myfun <- structure(
        function(x) {
                if(missing(x)) cat(frame.attr("hint"), "\n")
                something.else(x)
        },
        hint = "Consult your local statistician"
)