在JFreeChart中将原点从（0,0）切换到（0,50） [英] Shift the origin from (0,0) to (0,50) in JFreeChart

问题描述

如图所示，图是从y = 0行开始的，这里我想从y = 50开始绘制一个图，我如何在 JFreeChart 中指定它？

以下是一些代码：

  public class Profile {
 
 
 
 double last = 0; 
 public void generateProfile（int [] pointValue，double [] distance）{
 ArrayList pv = new ArrayList（）; 
 ArrayList dist = new ArrayList（）; 
 
 pv.add（pointValue）; 
 dist.add（distance）; 
 for（int i = 0; i< pv.size（）; i ++）{
 System.out.print（pointValue [i]）; 
} 
 for（int i = 0; i< dist.size（）; i ++）{
 System.out.print（distance [i]）; 
} 
 
 
 XYSeries series = new XYSeries（Average Weight）; 
 for（int i = 0; i< pointValue.length; i ++）{
 if（pointValue [i]！= 0）{
 
 series.add（last，pointValue [一世]）; 
 last = distance [i]; 
} 
} 
 
 
 XYDataset xyDataset = new XYSeriesCollection（series）; 
 JFreeChart图表; 
 
 chart = ChartFactory.createXYAreaChart（轮廓剖面图，距离，轮廓值，xyDataset，PlotOrientation.VERTICAL，true，true，false）; 
 ChartFrame frame1 =新的ChartFrame（XYLine Chart，chart）; 
 frame1.setVisible（true）; 
 frame1.setSize（300,300）; 
 
  

解决方案

您可以指定底部值使用你的例子：

<$ p $

使用你的例子：

p> JFreeChart图表;
chart = ChartFactory.createXYAreaChart（轮廓剖面视图，距离，轮廓值，xyDataset，PlotOrientation.VERTICAL，true，true，false）;

ValueAxis rangeAxis = chart.getXYPlot（）。getRangeAxis（）;
rangeAxis.setLowerBound（50.0f）;


As shown in image the graph is from line y=0, here i want to plot a graph from y=50, how can i specify this in JFreeChart?

Here is Some Code:

public class Profile  {



    double last=0;
    public void generateProfile(int[] pointValue,double[] distance){
        ArrayList pv=new ArrayList();
        ArrayList dist=new ArrayList();

        pv.add(pointValue);
        dist.add(distance);
        for(int i=0;i<pv.size();i++){
            System.out.print(pointValue[i]);
        }
        for(int i=0;i<dist.size();i++){
            System.out.print(distance[i]);
        }


        XYSeries series = new XYSeries("Average Weight");
        for(int i=0;i<pointValue.length;i++){
            if(pointValue[i]!=0){

              series.add(last,pointValue[i]);
              last=distance[i];
            }
         }


      XYDataset xyDataset = new XYSeriesCollection(series);
      JFreeChart chart;

      chart= ChartFactory.createXYAreaChart("Profile View Of Contour", "Distance", "Contour Value", xyDataset, PlotOrientation.VERTICAL, true, true, false);
      ChartFrame frame1=new ChartFrame("XYLine Chart",chart);
      frame1.setVisible(true);
      frame1.setSize(300,300);
    }

解决方案

You can specify the bottom value of the Y axis with the setLowerBound() method of the ValueAxis class.

Using your example:

JFreeChart chart;
chart = ChartFactory.createXYAreaChart("Profile View Of Contour", "Distance", "Contour Value", xyDataset, PlotOrientation.VERTICAL, true, true, false);

ValueAxis rangeAxis = chart.getXYPlot().getRangeAxis();
rangeAxis.setLowerBound(50.0f);

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