JFreeChart直方图+正态分布曲线

Question

我似乎无法想象这个JFreeChart。我已经阅读了很多问题，但似乎没有任何问题。我只需要在顶部显示一个正态分布曲线的直方图。

    XYPlot plot = new XYPlot();
    XYDataset dataset = createDataset();
    XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer();

    plot.setDataset(0, dataset);
    plot.setRenderer(0, renderer);

    XYDataset datasetNormal = createDatasetNormal();
    XYLineAndShapeRenderer lineRenderer = new XYLineAndShapeRenderer();
    plot.setDataset(1, datasetNormal);
    plot.setRenderer(1, lineRenderer);


     JFreeChart chart = new JFreeChart(plot);
    chartPanel.setLayout(null);
    ChartPanel chartPanel1 = new ChartPanel(chart);
    chartPanel1.setBounds(10, 15, 680, 420);
    chartPanel.add(chartPanel1);

以下是创建直方图+正常曲线的方法，temp是一个数组

1

private XYDataset createDatasetNormal() {
    Function2D normal = new NormalDistributionFunction2D(Double.parseDouble(dataCalc.getMean()),
            Double.parseDouble(dataCalc.getStnDev()));

    XYDataset dataset = DatasetUtilities.sampleFunction2D(normal, minValue(temp), maxValue(temp),
            (int) difference - 1, "Normal");
    return dataset;
}

2

private IntervalXYDataset createDataset() {
    HistogramDataset dataset = new HistogramDataset();
    double max = maxValue(temp);
    double min = minValue(temp);

    dataset.addSeries("Frequency", temp, (int) (difference - 1), min - 1, max + 1);

    return dataset;
}

我整个星期一直坚持这一点，所以非常感谢任何帮助！