用JFreeChart设置两个系列的不同y轴
用JFreeChart设置两个系列的不同y轴
提问于 2015-04-07 14:46:22
我使用JFreeChart绘制两个系列数据(XYSeries)。复杂的因素是，其中一个数据序列的y值通常比我的第二个数据序列的y值高得多(假设第一个系列的y值为数百万，而第二个系列的y值为数百个数量级)。在我的第一个数据集中的高值的存在导致图的范围是这样的，我的第二个数据集的y值是不可理解的。
在图中添加第二个y轴，这样我的两个数据序列都使用自己的y轴，就可以解决这个问题。有人知道如何用JFreeChart来做这件事吗？
当前完整性代码：
XYSeriesCollection dataset = new XYSeriesCollection();
XYSeries series1 = new XYSeries("series1");
XYSeries series2 = new XYSeries("series2");
// Here is my code to fill series1 and series2 with data
dataset.addSeries(series1);
dataset.addSeries(series2);
JFreeChart chart = ChartFactory.createXYLineChart(
"title", "x-axis title", "y-axis title", dataset, PlotOrientation.VERTICAL, true, true, false
);
chart.getXYPlot().setRenderer(new XYSplineRenderer());回答 2
Stack Overflow用户
回答已采纳
发布于 2015-04-07 16:01:39
您可以手动创建JFreeChart对象，而不是使用ChartFactory。首先生成数据集和绘图，将每个数据集设置为索引。然后，您可以使用必要的Axis和Renderer自定义绘图。下面是一个使用虚拟数据的示例，该数据集有两个数据集，每个数据集具有不同的y值：
//create the series - add some dummy data
XYSeries series1 = new XYSeries("series1");
XYSeries series2 = new XYSeries("series2");
series1.add(1000, 1000);
series1.add(1150, 1150);
series1.add(1250, 1250);
series2.add(1000, 111250);
series2.add(1150, 211250);
series2.add(1250, 311250);
//create the datasets
XYSeriesCollection dataset1 = new XYSeriesCollection();
XYSeriesCollection dataset2 = new XYSeriesCollection();
dataset1.addSeries(series1);
dataset2.addSeries(series2);
//construct the plot
XYPlot plot = new XYPlot();
plot.setDataset(0, dataset1);
plot.setDataset(1, dataset2);
//customize the plot with renderers and axis
plot.setRenderer(0, new XYSplineRenderer());//use default fill paint for first series
XYSplineRenderer splinerenderer = new XYSplineRenderer();
splinerenderer.setSeriesFillPaint(0, Color.BLUE);
plot.setRenderer(1, splinerenderer);
plot.setRangeAxis(0, new NumberAxis("Series 1"));
plot.setRangeAxis(1, new NumberAxis("Series 2"));
plot.setDomainAxis(new NumberAxis("X Axis"));
//Map the data to the appropriate axis
plot.mapDatasetToRangeAxis(0, 0);
plot.mapDatasetToRangeAxis(1, 1);
//generate the chart
JFreeChart chart = new JFreeChart("MyPlot", getFont(), plot, true);
chart.setBackgroundPaint(Color.WHITE);
JPanel chartPanel = new ChartPanel(chart);Stack Overflow用户
发布于 2019-01-29 23:49:43
我已经调整了上面的解决方案，以配合最新版本的JFreeChart (2019年1月29日)。
如果正确导入JFreeChart库，这将正确运行。我在导入中设置了一个pom.xml，如下所示
<dependency>
<groupId>org.jfree</groupId>
<artifactId>jfreechart</artifactId>
<version>1.0.19</version>
</dependency>下面是完整的代码片段：
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYSplineRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import javax.swing.*;
import java.awt.*;
class GraphTest2 {
// driver that actually runs the thing
public static void main(String[] args) {
SwingUtilities.invokeLater( () -> {
LineChartEx ex = new LineChartEx();
ex.setVisible(true);
});
}
}
class LineChartEx extends JFrame {
public LineChartEx() {
initUI();
}
private void initUI() {
//create the series - add some dummy data
XYSeries series1 = new XYSeries("series1");
XYSeries series2 = new XYSeries("series2");
series1.add(1000, 1000);
series1.add(1150, 1150);
series1.add(1250, 1250);
series2.add(1000, 111250);
series2.add(1150, 211250);
series2.add(1250, 311250);
//create the datasets
XYSeriesCollection dataset1 = new XYSeriesCollection();
XYSeriesCollection dataset2 = new XYSeriesCollection();
dataset1.addSeries(series1);
dataset2.addSeries(series2);
//construct the plot
XYPlot plot = new XYPlot();
plot.setDataset(0, dataset1);
plot.setDataset(1, dataset2);
//customize the plot with renderers and axis
plot.setRenderer(0, new XYSplineRenderer());//use default fill paint for first series
XYSplineRenderer splinerenderer = new XYSplineRenderer();
splinerenderer.setSeriesFillPaint(0, Color.BLUE);
plot.setRenderer(1, splinerenderer);
plot.setRangeAxis(0, new NumberAxis("Series 1"));
plot.setRangeAxis(1, new NumberAxis("Series 2"));
plot.setDomainAxis(new NumberAxis("X Axis"));
//Map the data to the appropriate axis
plot.mapDatasetToRangeAxis(0, 0);
plot.mapDatasetToRangeAxis(1, 1);
//generate the chart
JFreeChart chart = new JFreeChart("MyPlot", getFont(), plot, true);
chart.setBackgroundPaint(Color.WHITE);
//JPanel jpanel = new ChartPanel(chart);
// NEW PART THAT MAKES IT WORK
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setBorder(BorderFactory.createEmptyBorder(15, 15, 15, 15));
chartPanel.setBackground(Color.white);
add(chartPanel);
pack();
setTitle("Line chart");
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/29494440
复制相关文章
相似问题
腾讯云开发者
