plot.setRangeAxis(1, axis2);
plot.setRangeAxisLocation(1, AxisLocation.BOTTOM_OR_LEFT);
XYDataset dataset2 = createDataset("Mail", 1000.0, new Day(), 170);
plot.setDataset(1, dataset2);
plot.mapDatasetToRangeAxis(1, 1);
XYItemRenderer renderer2 = new StandardXYItemRenderer();
renderer2.setSeriesPaint(0, Color.red);
plot.setRenderer(1, renderer2);