基于jFreeChart生成散点图和折线图

最新推荐文章于 2025-04-14 11:48:51 发布

MasonYyp

最新推荐文章于 2025-04-14 11:48:51 发布

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分类专栏： JavaEE

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本文介绍如何使用Java的JFreeChart库进行线性拟合数据与原始数据的图表叠加绘制，通过创建并叠加两个数据集，分别用线条和散点表示，实现数据的直观对比展示。

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1、导入包
jcommon-1.0.23.jar
jfreechart-1.0.19.jar
2、程序执行结果

3、部分源程序

// 源代码在github上，地址：https://github.com/MasonYyp/GenerateGraphic/tree/master/
public class OverlaidDrawLineScatter extends ApplicationFrame {

private static final long serialVersionUID = 1L;

public OverlaidDrawLineScatter(String title) {

super(title);
JFreeChart chart = createOverlaidChart();
ChartPanel panel = new ChartPanel(chart, true, true, true, true, true);
panel.setPreferredSize(new java.awt.Dimension(800, 500));
setContentPane(panel);

}

/**
* Creates an overlaid chart.
*
* @return The chart.
*/
private JFreeChart createOverlaidChart() {
   // Add first data set and rendererLine
DefaultXYDataset dataLine = createDatasetLine();
XYItemRenderer rendererLine = new XYLineAndShapeRenderer();
NumberAxis XAxis = new NumberAxis("X 值");
NumberAxis YAxis = new NumberAxis("Y 值");
       NumberTickUnit unit=new NumberTickUnit(0.5);
       XAxis.setTickUnit(unit);
       YAxis.setTickUnit(unit);

// create plot
XYPlot plot = new XYPlot(dataLine, XAxis, YAxis, rendererLine);

// Add second data set and rendererScatter
DefaultXYDataset dataScatter = createDatasetScatter();
XYItemRenderer rendererScatter = new XYShapeRenderer();
plot.setDataset(1, dataScatter);
plot.setRenderer(1, rendererScatter);

// return a new chart containing the overlaid plot
return new JFreeChart("线性拟合", JFreeChart.DEFAULT_TITLE_FONT, plot, true);

}

/**
* Generate the dataset
* @return The dataset.
*/
private DefaultXYDataset createDatasetLine() {
   /*
   DefaultXYDataset dataset = new DefaultXYDataset();
   double[][] data= {{1,2,3},{4,5,6}};
   dataset.addSeries("拟合数据", data);
return dataset;
}

private DefaultXYDataset createDatasetScatter() {
   DefaultXYDataset dataset = new DefaultXYDataset();
       double[][] data= {{1,2,3},{4.6,4.8,6.8}};
       dataset.addSeries("原始数据", data);
return dataset;
}

public static void main(final String[] args) {
OverlaidDrawLineScatter demo = new OverlaidDrawLineScatter("工程数据线性拟合");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);

}
}