_A_c_c_e_s_s _t_o _t_h_e _F_o_r_m_a_l _A_r_g_u_m_e_n_t_s
	
	     formals(fun=sys.function(sys.parent()))
	
	_V_a_l_u_e:
	
	     If fun is a function then the formal argument list to
	     that function is returned.  If fun is a character
	     string then the function with that name is found and
	     used.  If fun is not specified then the function cal-
	     ling formals is used.
	
	     It is currently not possible to set the formals of a
	     function.
	
	_S_e_e _A_l_s_o:
	
	     args
	
	_E_x_a_m_p_l_e_s:
	
	     length(formals(lm))      # the number of formal arguments
	     names(formals(boxplot))  # formal arguments names