_E_x_p_r_e_s_s_i_o_n _D_e_p_a_r_s_i_n_g
	
	     deparse(expr)
	
	_V_a_l_u_e:
	
	     This function turns unevaluated expressions into char-
	     acter strings (a kind of inverse  parse).  A typical
	     use of this is to create informative labels for data
	     sets and plots.  The following example shows a simple
	     use of this facility.  It uses the functions deparse
	     and substitute to create labels for a plot which are
	     character string versions of the actual arguments to
	     the function myplot.
	
	_S_e_e _A_l_s_o:
	
	     substitute, parse.
	
	_E_x_a_m_p_l_e_s:
	
	     myplot <-
	     function(x, y)
	         plot(x, y, xlab=deparse(substitute(x)),
	             ylab=deparse(substitute(y)))