jFreechart将地图绘制到下一个绘图值(jFreechart Map plot to the next plot value)

 我是jfreechart的新手，我无法按顺序绘制值。 我有一系列数字，每个数字超过6个十进制值例如：（5.981412023,2636.51824），从+6.00000000到-6.00000000不等。 这些值取自excel表，它有一个图形（xy散射类型），它看起来与jfreechart创建的不同。 我发现这些值并没有按照我给出的顺序绘制，而是排列和绘制。 例如：如果我给出了像（8,6,2,9,4,7,5）这样的序列，那么该图就会被排列，然后该线看起来就像它所绘制的序列那样（2,4,5,6， 7,8,9）。 
 
 有什么方法可以在插入的一系列图中绘制它吗？ 抱歉我的英语。 
 
 例： 
 
package test;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;

public class PlotTest {
    private XYSeriesCollection dataset;

    public static void main (String[] args) {
        new PlotTest();
    }

    public PlotTest () {
        dataset = new XYSeriesCollection();
        XYSeries data = new XYSeries("data");
        data.add(3, 2); //Point 1
        data.add(1, 1); //Point 2
        data.add(4, 1); //Point 3
        data.add(2, 2); //Point 4
        dataset.addSeries(data);
        showGraph();
    }

    private void showGraph() {
        final JFreeChart chart = createChart(dataset);
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        final ApplicationFrame frame = new ApplicationFrame("Title");
        frame.setContentPane(chartPanel);
        frame.pack();
        frame.setVisible(true);
    }

    private JFreeChart createChart(final XYDataset dataset) {
        final JFreeChart chart = ChartFactory.createScatterPlot(
            "Title",                  // chart title
            "X",                      // x axis label
            "Y",                      // y axis label
            dataset,                  // data
            PlotOrientation.VERTICAL,
            true,                     // include legend
            true,                     // tooltips
            false                     // urls
        );
        XYPlot plot = (XYPlot) chart.getPlot();
        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
        renderer.setSeriesLinesVisible(0, true);
        plot.setRenderer(renderer);
        return chart;
    }

}
 
 基于上面的例子，我希望程序以1-2-3-4的顺序连接点，这是我将它们添加到我的数据集的顺序。 但是我按照2-4的顺序将它们连接起来，按x值排序。 

I am new to jfreechart and i am having trouble plotting the values in sequence. i have series of numbers with each one having more than 6 decimal values example:(5.981412023,2636.51824) and varying from +6.00000000 to -6.00000000. The values are taken from excel sheet and it has a graph(xy scatter type), which doesn't look similar to the one created by jfreechart. I found out that the values are not plotted in the sequence which i gave but its arranged and plotted. example: if i gave the sequence like (8,6,2,9,4,7,5), the plot is arranged and then the line looks like its plotted to this arranged sequence like (2,4,5,6,7,8,9).
 
Is there any way i can plot it in a sequence of the plots inserted ? sorry about my English.
 
Example:
 
package test;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;

public class PlotTest {
    private XYSeriesCollection dataset;

    public static void main (String[] args) {
        new PlotTest();
    }

    public PlotTest () {
        dataset = new XYSeriesCollection();
        XYSeries data = new XYSeries("data");
        data.add(3, 2); //Point 1
        data.add(1, 1); //Point 2
        data.add(4, 1); //Point 3
        data.add(2, 2); //Point 4
        dataset.addSeries(data);
        showGraph();
    }

    private void showGraph() {
        final JFreeChart chart = createChart(dataset);
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        final ApplicationFrame frame = new ApplicationFrame("Title");
        frame.setContentPane(chartPanel);
        frame.pack();
        frame.setVisible(true);
    }

    private JFreeChart createChart(final XYDataset dataset) {
        final JFreeChart chart = ChartFactory.createScatterPlot(
            "Title",                  // chart title
            "X",                      // x axis label
            "Y",                      // y axis label
            dataset,                  // data
            PlotOrientation.VERTICAL,
            true,                     // include legend
            true,                     // tooltips
            false                     // urls
        );
        XYPlot plot = (XYPlot) chart.getPlot();
        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
        renderer.setSeriesLinesVisible(0, true);
        plot.setRenderer(renderer);
        return chart;
    }

}
 
Based on the above example, I want the program to connect the dots in order 1-2-3-4, which is the order I added them to my dataset. But I do get them connected in order 2-4-1-3, sorted by x-value.

原文：https://stackoverflow.com/questions/30593813