_C_l_e_v_e_l_a_n_d _D_o_t_c_h_a_r_t_s
	
	     dotplot(x, labels=NULL, groups=NULL, gdata=NULL,
	             color, gcolor, pch=11, gpch=11, cex, ...)
	
	_A_r_g_u_m_e_n_t_s:
	
	           x : either a vector or matrix of numeric values
	               (NAs are allowed).  If x is a matrix the
	               overall plot consists of juxtaposed dotplots
	               for each row.
	
	      labels : a vector of labels for each point.  For vec-
	               tors the default is to use names(x) and for
	               matrices the row labels dimnames(x)[[1]].
	
	       group : an optional factor indicating how the ele-
	               ments of x are grouped.  If x is a matrix,
	               the groups will default to the columns of x.
	
	       gdata : data values for the groups.  This is typi-
	               cally a summary such as the median or mean of
	               each group.
	
	       color : the color to be used for points an labels.
	
	      gcolor : the color to be used for group labels and
	               values.
	
	         pch : the plotting character or symbol to be used.
	
	        gpch : the plotting character or symbol to be usea
	               for group values.
	
	         cex : the character size to be used.  Setting cex
	               to value smaller than one can be a useful way
	               of avoiding label overlap.
	
	         ... : graphical parameters can also be specified as
	               arguments.
	
	_V_a_l_u_e:
	
	     This function is invoked for its side effect, which is
	     to produce two variants of dotplots as described in
	     Cleveland's graphics book.
	
	     Dotcharts are a reasonable substitute for barcharts.
	
	_R_e_f_e_r_e_n_c_e_s:
	
	     Cleveland, W. S. (1985).  The Elements of Graphing
	     Data, Monterey, CA: Wadsworth.
	
	_E_x_a_m_p_l_e_s:
	
	     data(deaths)
	     dotplot(deaths, main="Death Rates in Virginia - 1940")
	     dotplot(t(deaths), main="Death Rates in Virginia - 1940")