X，Y軸-JfreeChart的設置範圍

Question

有關如何設置X軸和Y軸範圍的任何建議。

我的「X軸」範圍是從「0.00到1.00」，差異爲「0.05」。我的意思是0.00 0.05 0.10 0.15 ..... 0.90 0.95 1.00

我的「Y軸」範圍是從「0.0到1.0」，差值是「0.1」。我的意思是0.0 0.1 0.2 0.3 0.4 ......... 0.9 1.0

我試過這樣做，但它不反映在圖上;我不知道如何將它應用於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); 
} 

任何有關這方面的幫助將是偉大的。

Answer 1

我猜你的新NumberAxis實例沒有被劇情使用;使用現有的工廠可能會更容易。

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); 
      } 
     }); 
    } 
} 

Answer 2

除非你貼的代碼是不完整的，它看起來像你的問題是，你沒有，你與你的情節創建的NumberAxis對象相關聯。

而不是創建新的對象NumberAxis手動，嘗試獲得與您的情節關聯的默認ValueAxis對象，然後修改其屬性：

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));