ScatterPlot3DDemo2
            A demo showing a scatter plot for 2,000 random data item 
            (each point is represented by a small colored cube).  Click on 
            the checkbox to switch between a logarithmic y-axis scale and a
            linear y-axis scale.
            
            In this chart, the data comes from an XYZDataset and 
            the plot is an XYZPlot.