X，Y轴-JfreeChart的设置范围
有关如何设置X轴和Y轴范围的任何build议。
我的“X轴”范围是从“0.00到1.00”，相差“0.05”。 我的意思是0.00 0.05 0.10 0.15 ….. 0.90 0.95 1.00
我的“Y轴”范围是从“0.0到1.0”，相差“0.1”。 我的意思是0.0 0.1 0.2 0.3 0.4 ……… 0.9 1.0
我试图这样做，但它不反映在图表上; 我不知道如何将它应用到ChartFactory.createScatterPlot() 。
final NumberAxis domainAxis = new NumberAxis("X-Axis"); domainAxis.setRange(0.00,1.00); domainAxis.setTickUnit(new NumberTickUnit(0.1)); final NumberAxis rangeAxis = new NumberAxis("Y-Axis"); rangeAxis.setRange(0.0,1.0); rangeAxis.setTickUnit(new NumberTickUnit(0.05)); public JPanel createDemoPanel() { XYDataset dataset1 = samplexydataset2(); JFreeChart jfreechart = ChartFactory.createScatterPlot("Scatter Plot Demo", "X", "Y",dataset1, PlotOrientation.VERTICAL, true, true, false); }
任何有关这方面的帮助将是伟大的。
我猜你的新的NumberAxis实例没有被剧情使用; 使用现有的工厂可能会更容易。
import java.awt.BorderLayout; import java.awt.Color; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.util.*; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import org.jfree.chart.*; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.NumberTickUnit; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYItemRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; /** * @see http://stackoverflow.com/questions/7231824 * @see http://stackoverflow.com/questions/7205742 * @see http://stackoverflow.com/questions/7208657 * @see http://stackoverflow.com/questions/7071057 */ public class ScatterAdd extends JFrame { private static final int N = 8; private static final String title = "Scatter Add Demo"; private static final Random rand = new Random(); private XYSeries added = new XYSeries("Added"); public ScatterAdd(String s) { super(s); final ChartPanel chartPanel = createDemoPanel(); this.add(chartPanel, BorderLayout.CENTER); JPanel control = new JPanel(); control.add(new JButton(new AbstractAction("Add") { @Override public void actionPerformed(ActionEvent e) { for (int i = 0; i < N; i++) { added.add(rand.nextDouble(), rand.nextDouble()); } } })); this.add(control, BorderLayout.SOUTH); } private ChartPanel createDemoPanel() { JFreeChart jfreechart = ChartFactory.createScatterPlot( title, "X", "Y", createSampleData(), PlotOrientation.VERTICAL, true, true, false); XYPlot xyPlot = (XYPlot) jfreechart.getPlot(); xyPlot.setDomainCrosshairVisible(true); xyPlot.setRangeCrosshairVisible(true); XYItemRenderer renderer = xyPlot.getRenderer(); renderer.setSeriesPaint(0, Color.blue); NumberAxis domain = (NumberAxis) xyPlot.getDomainAxis(); domain.setRange(0.00, 1.00); domain.setTickUnit(new NumberTickUnit(0.1)); domain.setVerticalTickLabels(true); NumberAxis range = (NumberAxis) xyPlot.getRangeAxis(); range.setRange(0.0, 1.0); range.setTickUnit(new NumberTickUnit(0.1)); return new ChartPanel(jfreechart); } private XYDataset createSampleData() { XYSeriesCollection xySeriesCollection = new XYSeriesCollection(); XYSeries series = new XYSeries("Random"); for (int i = 0; i < N * N; i++) { double x = rand.nextDouble(); double y = rand.nextDouble(); series.add(x, y); } xySeriesCollection.addSeries(series); xySeriesCollection.addSeries(added); return xySeriesCollection; } public static void main(String args[]) { EventQueue.invokeLater(new Runnable() { @Override public void run() { ScatterAdd demo = new ScatterAdd(title); demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); demo.pack(); demo.setLocationRelativeTo(null); demo.setVisible(true); } }); } }
除非你粘贴的代码不完整，否则你的问题就是你没有把你创build的NumberAxis对象与你的图相关联。
不要手动创build新的NumberAxis对象，而是尝试获取与您的图相关联的默认ValueAxis对象，然后修改其属性：
XYPlot xyPlot = jfreechart.getXYPlot(); ValueAxis domainAxis = xyPlot.getDomainAxis(); ValueAxis rangeAxis = xyPlot.getRangeAxis(); domainAxis.setRange(0.0, 1.0); domainAxis.setTickUnit(new NumberTickUnit(0.1)); rangeAxis.setRange(0.0, 1.0); rangeAxis.setTickUnit(new NumberTickUnit(0.05));
