如何使用jfreechart从上到下绘制折线图？ [英] How to draw line chart using jfreechart from top to bottom?

问题描述

我正在使用jfreechart绘制折线图，​​我需要从上到下绘制线条
....含义：0,0坐标将位于左上角。
当我通过改变'PlotOrientation'使用'CategoryPlot'时，我能够做到这一点，但是左边的标签变成了重叠......不知何故，我更喜欢'xyplot'

I'm using jfreechart to draw line chart , I need the line to be drawn from top to bottom .... Meaning: 0,0 coordinates will be in the top-left corner. I was able to do it when I used 'CategoryPlot' just by change 'PlotOrientation' but label on the left became overlap..anyhow, I prefer 'xyplot'

更改'setInverted'或'setDomainAxisLocation'没有帮助

changing 'setInverted' or 'setDomainAxisLocation' did not help

任何帮助将不胜感激

更新：
我重新发布我的代码以获得更好的清晰度（图表绘图部分）

update: I'm reposting my code for better clarity (chart drawing part )

在第一个代码中：
我得到了所需的输出
显示在这里
http://i58.tinypic.com/r1fr01.jpg
只需在此部分传递'PlotOrientation.HORIZONTAL'
，我正在使用'CategoryPlot'

In the first code: I got the needed output as showing here http://i58.tinypic.com/r1fr01.jpg just by passing 'PlotOrientation.HORIZONTAL' in this part, I'm using 'CategoryPlot'

import java.awt.*;

import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;

import org.jfree.ui.*;

public class PCategory extends ApplicationFrame
{
    public PCategory(String s)
    {
        super(s);
        JPanel jpanel = createDemoPanel();
        jpanel.setPreferredSize(new Dimension(300, 200));
        setContentPane(jpanel);
    }

    private static CategoryDataset createDataset()
    {

        DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
        defaultcategorydataset.addValue(0,"Pixels", Integer.toString(0));
        defaultcategorydataset.addValue(2,"Pixels", Integer.toString(1));
        defaultcategorydataset.addValue(5,"Pixels", Integer.toString(2));
        defaultcategorydataset.addValue(10,"Pixels", Integer.toString(3));
        defaultcategorydataset.addValue(7,"Pixels", Integer.toString(4));
        defaultcategorydataset.addValue(8,"Pixels", Integer.toString(5));


        return defaultcategorydataset;
    }
    private static JFreeChart createChart(CategoryDataset categorydataset)
    {
        JFreeChart jfreechart = ChartFactory.createLineChart(null, null, null, categorydataset, PlotOrientation.HORIZONTAL, false, true, false);
        jfreechart.addSubtitle(new TextTitle("Title"));
        CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();
        categoryplot.setRangePannable(true);
        categoryplot.setRangeGridlinesVisible(false);

        ChartUtilities.applyCurrentTheme(jfreechart);
        LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer)categoryplot.getRenderer();
        lineandshaperenderer.setBaseShapesVisible(true);
        lineandshaperenderer.setDrawOutlines(true);
        lineandshaperenderer.setUseFillPaint(true);
        lineandshaperenderer.setBaseFillPaint(Color.white);
        lineandshaperenderer.setSeriesStroke(0, new BasicStroke(3F));
        lineandshaperenderer.setSeriesOutlineStroke(0, new BasicStroke(2.0F));
        lineandshaperenderer.setSeriesShape(0, new java.awt.geom.Ellipse2D.Double(-5D, -5D, 10D, 10D));

        return jfreechart;
    }

    public static JPanel createDemoPanel()
    {
        JFreeChart jfreechart = createChart(createDataset());
        ChartPanel chartpanel = new ChartPanel(jfreechart);
        chartpanel.setMouseWheelEnabled(true);

        return chartpanel;
    }

    public static void main(String args[])
    {
        PCategory PCategory = new PCategory("PCategory.java");
        PCategory.pack();
        RefineryUtilities.centerFrameOnScreen(PCategory);
        PCategory.setVisible(true);
    }
}

在第二个代码中：
我没有得到我需要的东西，即使我使用相同的数据并传递
'PlotOrientation.HORIZONTAL'
如此处显示
http://i57.tinypic.com/11hq9tk.jpg
我评论了解决问题的方法

In the second code: I didn't get what I need even though I used same data and pass 'PlotOrientation.HORIZONTAL' as showing here http://i57.tinypic.com/11hq9tk.jpg I commented out my approach to solve the problem

import java.awt.Dimension;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.*;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class PXYPlot extends ApplicationFrame {
    public PXYPlot(String s) {
        super(s);
        JPanel jpanel = createPanel();
        jpanel.setPreferredSize(new Dimension(300, 200));
        setContentPane(jpanel);
    }
    private static XYDataset createDataset() {
        XYSeries xyseries = new XYSeries("Pixels", true);

        xyseries.add(0, 0);
        xyseries.add(2, 1);
        xyseries.add(5, 2);
        xyseries.add(10, 3);
        xyseries.add(7, 4);
        xyseries.add(8, 5);

        XYSeriesCollection xyseriescollection = new XYSeriesCollection();
        xyseriescollection.addSeries(xyseries);
        return xyseriescollection;

    }
    private static JFreeChart createChart(XYDataset xydataset)
    {
        JFreeChart Mychart = ChartFactory.createXYLineChart(null, null, null, xydataset, PlotOrientation.HORIZONTAL, true, true, false);
        XYPlot xyplot = (XYPlot) Mychart.getPlot();
        xyplot.setDomainPannable(true);
        xyplot.setRangePannable(true);
        XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer) xyplot.getRenderer();
        xylineandshaperenderer.setBaseShapesVisible(true);
        xylineandshaperenderer.setBaseShapesFilled(true);


    /* ----------- this part is my attempt to solve the problem -----

        NumberAxis numberaxis = (NumberAxis)xyplot.getRangeAxis();
        numberaxis.setInverted(true);
        xyplot.setDomainAxisLocation(AxisLocation.TOP_OR_LEFT);

        //------------I like XYplot because of the part -----------------
        NumberAxis xAxis = new NumberAxis();
        xAxis.setTickUnit(new NumberTickUnit(1));
        XYPlot plot = (XYPlot) Mychart.getPlot();
        plot.setDomainAxis(xAxis);
        //-----------------------------
        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        */

        return Mychart;
    }
    public static JPanel createPanel() {
        JFreeChart jfreechart = createChart(createDataset());
        ChartPanel chartpanel = new ChartPanel(jfreechart);
        chartpanel.setMouseWheelEnabled(true);
        return chartpanel;
    }
    public static void main(String args[]) {
        PXYPlot PXYPlot = new PXYPlot("PXYPlot.java");
        PXYPlot.pack();
        RefineryUtilities.centerFrameOnScreen(PXYPlot);
        PXYPlot.setVisible(true);
    }
}

我需要'XYPlot'，因为我的金额巨大数据，我认为'CategoryPlot'不是为它而设计的，除此之外我还有重叠的问题。此外，它需要覆盖次数以满足我的需求

I need 'XYPlot' because I have a huge amount of data , I think 'CategoryPlot' is not designed for it, beside I have overlapping issue with it. In addition, it needs number of overriding in order to meet my needs

推荐答案

首先，按如下方式创建数据集然后不要改变它......无论你想如何呈现它，数据都是一样的：

First, create your dataset as follows then don't change it...the data is the same no matter how you want to present it:

    private XYDataset createDataset() {
        XYSeries s1 = new XYSeries("S1");
        s1.add(0, 0);
        s1.add(1, 2);
        s1.add(2, 5);
        s1.add(3, 10);
        s1.add(4, 7);
        s1.add(5, 8);
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(s1);
        return dataset;
   }

现在合理标准的JFreeChart创建将如下所示：

Now a reasonably standard JFreeChart creation would look like this:

...这里是代码：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.geom.Ellipse2D;
import javax.swing.JFrame;
import org.jfree.chart.ChartFactory;
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.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

public class StackOverflow25993430 extends JFrame {

    public StackOverflow25993430(String title) {
        super(title);
        JFreeChart chart = createChart(createDataset());
        ChartPanel panel = new ChartPanel(chart);
        panel.setPreferredSize(new Dimension(500, 300));
        setContentPane(panel);
    }

    private XYDataset createDataset() {
        XYSeries s1 = new XYSeries("S1");
        s1.add(0, 0);
        s1.add(1, 2);
        s1.add(2, 5);
        s1.add(3, 10);
        s1.add(4, 7);
        s1.add(5, 8);
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(s1);
        return dataset;
    }

    private JFreeChart createChart(XYDataset dataset) {
        JFreeChart chart = ChartFactory.createXYLineChart(
                "StackOverflow25993430", "X", "Y", dataset);
        chart.removeLegend();
        XYPlot plot = (XYPlot) chart.getPlot();
        XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
        renderer.setSeriesShapesVisible(0, true);
        renderer.setSeriesShape(0, new Ellipse2D.Double(-4.0, -4.0, 8.0, 8.0));
        renderer.setSeriesFillPaint(0, Color.WHITE);
        renderer.setUseFillPaint(true);
        NumberAxis xAxis = (NumberAxis) plot.getDomainAxis();
        xAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        return chart;
    }

    public static void main(String[] args) {
        JFrame app = new StackOverflow25993430("JFreeChart");
        app.pack();
        app.setVisible(true);
    }
}

很少需要改变以获得你想要的情节。首先，应该改变绘图方向，其次应该反转x轴，第三，你必须提供y轴应该在顶部的提示。结果如下：

Very little needs changing to get the plot you want. First, the plot orientation should be changed, second the x-axis should be inverted, and third you have to provide a hint that the y-axis should go at the top. Here is the result:

...以及生成它的代码（***标记已添加的5行）：

... and the code to produce it (with *** marking the 5 lines that were added):

import java.awt.Color;
import java.awt.Dimension;
import java.awt.geom.Ellipse2D;
import javax.swing.JFrame;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisLocation; // ***
import org.jfree.chart.axis.NumberAxis;
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;

public class StackOverflow25993430b extends JFrame {

    public StackOverflow25993430b(String title) {
        super(title);
        JFreeChart chart = createChart(createDataset());
        ChartPanel panel = new ChartPanel(chart);
        panel.setPreferredSize(new Dimension(500, 300));
        setContentPane(panel);
    }

    private XYDataset createDataset() {
        XYSeries s1 = new XYSeries("S1");
        s1.add(0, 0);
        s1.add(1, 2);
        s1.add(2, 5);
        s1.add(3, 10);
        s1.add(4, 7);
        s1.add(5, 8);
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(s1);
        return dataset;
    }

    private JFreeChart createChart(XYDataset dataset) {
        JFreeChart chart = ChartFactory.createXYLineChart(
                "StackOverflow25993430b", "X", "Y", dataset);
        chart.removeLegend();
        XYPlot plot = (XYPlot) chart.getPlot();
        plot.setOrientation(PlotOrientation.HORIZONTAL); // ***
        plot.setRangeAxisLocation(AxisLocation.TOP_OR_LEFT); // ***
        XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
        renderer.setSeriesShapesVisible(0, true);
        renderer.setSeriesShape(0, new Ellipse2D.Double(-4.0, -4.0, 8.0, 8.0));
        renderer.setSeriesFillPaint(0, Color.WHITE);
        renderer.setUseFillPaint(true);
        NumberAxis xAxis = (NumberAxis) plot.getDomainAxis();
        xAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        xAxis.setInverted(true); // ***
        return chart;
    }

    public static void main(String[] args) {
        JFrame app = new StackOverflow25993430b("JFreeChart");
        app.pack();
        app.setVisible(true);
    }
}

这篇关于如何使用jfreechart从上到下绘制折线图？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！