%L+%                    Add components to a ggloop object.
%M%                     The modified combination of the modulus
                        function ('%%') and integer divisor function
                        ('%/%').
%R%                     The replacement operator. Replaces the 'lhs'
                        with 'rhs' on the condition that 'length(lhs)
                        == FALSE' (the length is '0').
aes_eval                Assign inputs to 'x', 'y' or 'dots'.
aes_group               Create unique pairings between 'x', 'y' and
                        'dots'.
aes_loop                Create a list of grouped aesthetic mappings.
cur_vars_env            Helper functions to select NSE (non-standard
                        evaluation) variable names.
expand.grid2            A new version of an old favorite with some
                        extra options
extract                 Extract the nth element from vectors in a list.
fun.par                 Regular expression pattern for determing if
                        possible function parenthesis are present.
                        Searches for '"("' and '")"' preceeded by any
                        number of characters.
ggloop                  Create ggplot plots in a loop.
is.c                    Determine if the first element of a parse tree
                        is identical to the 'c' function.
is.fun                  Is it a function?
is.op                   Determine if an input uses an arithmetical
                        operator ('/', '+', '-', '*', '^').
isFALSE                 This is an abbreviation of identical(FALSE, x)
                        to go along with isTRUE()
list.pos                Finds the position of a named list element
                        within a list (with no recurssion).
map_aes                 Loop through a list of grouped variables and
                        assign class "uneval" to each element in the
                        group.
messy_eval              Reduce the amount of code by turning this
                        sequence into a function.
name_groups             Extract names for the first level of list
                        components for the returned value of
                        'ggloop()'.
name_subgroups          Extract names for the second level of list
                        components for the returned value of
                        'ggloop()'.
recycle.NA              A vector recycler using 'NA'.
recycle.vector          A vector recycler using the contents of the
                        shorter vector to do the recycling.
remap_xy_FALSE          Mimicks R's internal recycling mechanism for
                        the shorter of the two vectors.
remap_xy_NA             Attaches NA during recycling of the smaller of
                        the two vectors.
remap_xy_TRUE           Uses 'expand.grid()' to create all possible
                        combinations of xy pairings.
rm.gg2                  Remove 'ggplot2' style and stand-alone
                        aesthetic arguments (i.e. 'y', 'x:z', etc).
what                    Console function for determing: class, type,
                        mode, and names of an object.
