_B_o_x _P_l_o_t_s
	
	     boxplot(..., range=1.5, width, varwidth=FALSE,
	         notch=FALSE, names, plot=TRUE, col, fill=NULL)
	
	_A_r_g_u_m_e_n_t_s:
	
	         ... : the data from which the boxplots are to be
	               produced.  The data can be specified as
	               separate vectors, each corresponding to a
	               component boxplot, or as a single list con-
	               taining such vectors.  Alternatively a sym-
	               bolic specification of the form x ~ g can be
	               given, indicating the the observations in the
	               vector x are to be grouped according to the
	               levels of the factor g.  NAs are allowed in
	               the data.
	
	       range : this determines how far the plot whiskers
	               extend out from the box.  If range is posi-
	               tive, the whiskers extend to the most extreme
	               data point which is no more than range times
	               the interquartile range from the box.  A
	               value of zero causes the whiskers to extend
	               to the data extremes.
	
	       width : a vector giving the relative widths of the
	               boxes making up the plot.
	
	    varwidth : if varwidth is TRUE, the boxes are drawn with
	               widths proportional to the square-roots of
	               the number of observations in the groups.
	
	       notch : if notch is TRUE, a notch is drawn in each
	               side of the boxes.  If the notches of two
	               plots do not overlap then the medians are
	               significantly different at the 5 percent
	               level.
	
	        name : group labels which while be printed under
	               each boxplot.
	
	        plot : if plot is TRUE (the default) then a boxplot
	               is produced.  If not, the summaries which the
	               boxplots are based on are returned.
	
	         col : an optional vector of colors for the outlines
	               of the boxplots.  The values in col are recy-
	               cled if the length of col is less than the
	               number of plots.
	
	        fill : if fill is non-null it is assumed to contain
	               colors to be used to fill the bodies of the
	               box plots.
	
	_D_e_s_c_r_i_p_t_i_o_n:
	
	     boxplot produces box-and-whisker plots of the given
	     values.  The data which are used to construct plots may
	     be passed as a sequence of vector arguments, or as a
	     single list of vectors.  The command split can be used
	     to create the right kind of list.
	
	_V_a_l_u_e_s:
	
	     A list with one component corresponding to each plot.
	     The components are themselves lists with named com-
	     ponents as follows:
	
	  stats : a vector containing the extreme of the lower
	          whisker, the lower hinge, the median, the upper
	          hinge and the extreme of the upper whisker.
	
	      n : the number of observations in the sample.
	
	   conf : the lower and upper extremes of the notch.
	
	    out : the values of any data points which lie beyond the
	          extremes of the whiskers.
	
	_E_x_a_m_p_l_e_s:
	
	     boxplot(precipitation)
	     boxplot(split(warpbreaks,col(warpbreaks,factor=TRUE)))