@Override
public Chart getChart() {
// Create Chart
Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("Score Histogram").xAxisTitle("Mean").yAxisTitle("Count").build();
Histogram histogram1 = new Histogram(getGaussianData(1000), 10, -30, 30);
chart.addSeries("histogram 1", histogram1.getxAxisData(), histogram1.getyAxisData());
Histogram histogram2 = new Histogram(getGaussianData(1000), 10, -30, 30);
chart.addSeries("histogram 2", histogram2.getxAxisData(), histogram2.getyAxisData());
// Customize Chart
chart.getStyleManager().setLegendPosition(LegendPosition.InsideNW);
chart.getStyleManager().setBarWidthPercentage(.96);
return chart;
}