Jfree图xy线实现

Question

我想在一个数据集中绘制4行，但我不能。能ANY1告诉我什么库需要在jfree以及我如何在1个图表实现它们

public void visualise(){ 
//visualise data 
    XYSeries series = new XYSeries("Membrane mVolt"); 
XYSeries series2 = new XYSeries("potassium_channel_n_gate_n"); 
XYSeries series3 = new XYSeries("sodium_channel_h_gate_h"); 
XYSeries series4 = new XYSeries("sodium_channel_m_gate_m"); 
//add data to charts 
for(int l=0;l<301;l++){ 
series.add(tData[l], YData[0][l]); 
series2.add(tData[l], YData[1][l]); 
series3.add(tData[l], YData[2][l]); 
series4.add(tData[l], YData[3][l]); 
} 
//create lines 
XYDataset xyDataset = new XYSeriesCollection(series); 
XYDataset xyDataset2 = new XYSeriesCollection(series2); 
XYDataset xyDataset3 = new XYSeriesCollection(series3); 
XYDataset xyDataset4 = new XYSeriesCollection(series4); 

//visualize 
JFreeChart chart = ChartFactory.createXYLineChart("Membrane", "time","data",xyDataset,  PlotOrientation.VERTICAL, true, true, false); 
JFreeChart chart2 = ChartFactory.createXYLineChart("Potassium Channel n", "time""data",xyDataset2,PlotOrientation.VERTICAL, true, true, false); 
JFreeChart chart3 = ChartFactory.createXYLineChart("Sodium Channel h", "time","data",xyDataset3, PlotOrientation.VERTICAL, true, true, false); 
JFreeChart chart4 = ChartFactory.createXYLineChart("Sodium Channel m", "time", "data",xyDataset4, 
    PlotOrientation.VERTICAL, true, true, false); 
//open window 
ChartFrame frame1=new ChartFrame(" ",chart); 
ChartFrame frame2=new ChartFrame(" ",chart2); 
ChartFrame frame3=new ChartFrame(" ",chart3); 
ChartFrame frame4=new ChartFrame(" ",chart4); 

//make window 
frame1.setVisible(true); 
frame1.setSize(900,900); 
frame2.setVisible(true); 
frame2.setSize(900,900); 
frame3.setVisible(true); 
frame3.setSize(900,900); 
frame4.setVisible(true); 
frame4.setSize(900,900); 
} 

Answer 1

这example展示了如何将多个系列添加到DefaultXYDataset。