_B_o_x _P_l_o_t_s
	
	     boxplot(..., range=1.5, width, varwidth=FALSE,
	             notch=FALSE, names, data, plot=TRUE, col=NULL,
	             border=par("fg"))
	
	_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.  In this case the
	               argument data can be used to provide values
	               for the variables in the specification.  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.
	
	      border : an optional vector of colors for the outlines
	               of the boxplots.  The values in border are
	               recycled if the length of border is less than
	               the number of plots.
	
	         col : if col is non-null it is assumed to contain
	               colors to be used to col the bodies of the
	               box plots.
	
	         ... : graphical parameters can also be passed as
	               arguments to boxplot.
	
	_V_a_l_u_e_s:
	
	     This function is usually invoked for its side effect
	     which is to produce box-and-whisker plots of the given
	     values.  However, it also returns a list with one com-
	     ponent corresponding to each plot.  The components are
	     themselves lists with named components 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:
	
	     data(insects)
	     boxplot(count~spray, data=insects, col="lightgray")