| The classes here provide basic features needed for our plotting 
              tasks. With these exercises you can enhance and customize the classes.  
             
              Add the ability to put a label on the vertical axes and for 
                tick marks in PlotPanel. 
                Also, allow for the axes scales to go from high to low starting 
                at the origin. 
 
Add the option of log scaling on the axes in PlotPanel.
 
Create a new version of PlotFormat 
                that uses the java.util.Formatter 
                class discussed in Chapter 
                5: Tech and Chapter 
                9: Java.
 
Create an enhanced histogramming display program by adding more 
                capabilities to the Histogram 
                and HistPanel 
                classes such as displaying the mean and standard deviation values, 
                the number of entries in each bin, the total number of entries, 
                etc.
 
Provide an option in the HistPanel 
                class for drawing a symbol instead of a vertical bar. Also, allow 
                for the option of an error bar that's equal to the square root 
                of the number of entries in the bin. |