使用jFreeChart绘制滞后循环 [英] Plotting a hysteresis loop with jFreeChart

问题描述

我需要绘制磁滞回线，然后计算循环内闭合的区域。我正在使用jFreeChart。

I need to draw hysteresis loops and then calculate the area closed within the loop. I am using jFreeChart.

考虑以下数据：

 hyst[0]=0;
       hyst[1]=0;
       hyst[2]=0.0098;
       hyst[3]=0.0196;
       hyst[4]=0.0489;
       hyst[5]=0.0879;
       hyst[6]=0.0684;
       hyst[7]=0.0489;
       hyst[8]=0.0196;
       hyst[9]=0.0098;
       hyst[10]=0;
       hyst[11]=0;
       hyst[12]=0;
       hyst[13]=0;
       hyst[14]=0;
       hyst[15]=-0.0195;
       hyst[16]=-0.0488;
       hyst[17]=-0.0391;
       hyst[18]=-0.0195;
       hyst[19]=0;
       hyst[20]=0;

当我尝试：

   public void plotHysteresis()
   {
       int j=0;
       int i=0;
       XYSeries series1 = new XYSeries("Before Treatment");
      // DefaultCategoryDataset series1 = new DefaultCategoryDataset();
       for(i=0;i<6;i++)
       {    
        series1.add(j,hyst[i]);
        logTextArea.append(Integer.toString(j) +" : " +Double.toString(hyst[i])+"\n");
        j=j+5;
       }
       j=j-5; 
       for(;i<11;i++)
       {
        j=j-5;   
        series1.add(j,hyst[i]);
        logTextArea.append(Integer.toString(j) +" : " +Double.toString(hyst[i])+"\n");
       }
        for(;i<16;i++)
       {
        j=j-5;   
        series1.add(j,hyst[i]);
        logTextArea.append(Integer.toString(j) +" : " +Double.toString(hyst[i])+"\n");
       }
           for(;i<21;i++)
       {
        j=j+5;   
        series1.add(j,hyst[i]);
        logTextArea.append(Integer.toString(j) +" : " +Double.toString(hyst[i])+"\n");
       }

    XYSeriesCollection dataset = new XYSeriesCollection();
    dataset.addSeries(series1);

    JFreeChart chart = ChartFactory.createXYAreaChart(
"Hysteresis Plot", // chart title
"Pounds (lb)", // x axis label
"Distance (inches)", // y axis label
dataset, // data
PlotOrientation.VERTICAL,
true, // include legend
true, // tooltips
false // urls
);
    chart.setBackgroundPaint(Color.white);

    ChartPanel frame = new ChartPanel(chart);
    frame.setVisible(true);
    frame.setSize(plotPanel.getWidth(),plotPanel.getHeight());
    plotPanel.add(frame);
    plotPanel.repaint();
   }

它给出了以下结果：

如果我使用：

 JFreeChart chart = ChartFactory.createXYLineChart(
"Hysteresis Plot", // chart title
"Pounds (lb)", // x axis label
"Distance (inches)", // y axis label
dataset, // data
PlotOrientation.VERTICAL,
true, // include legend
true, // tooltips
false // urls
);

我给出：

我需要一个看起来像的滞后图：

I need a hysteresis plot that looks like:

我猜不同之处在于连接点的方式。请指导如何使用jFreeChart获得所需的滞后循环，然后如何计算所包含的区域。

I guess the difference is the way points are being connected. Please guide how to obtained the desired hysteresis loop with jFreeChart and then how to calculate area enclosed.

谢谢

推荐答案

如何更改线条颜色以及表示数据点的符号。我希望他们所有人都是统一的。

How can I change the line color as well the symbols representing the data points. I want all of them to be uniform.

看来你已经确定了 JFreeChart 供您查看。合成一些其他评论，

It appears you've settled on JFreeChart for your view. Synthesizing a few other comments,

• 您可以通过提供<$ c $来使您的几个系列的颜色和形状均匀c> DrawingSupplier ，如此处所示，并显示这里。

您可以将该系列组合成 GeneralPath 并按照此处的概述估算区域。

You can combine the series into a GeneralPath and estimate the area as outlined here.

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