我需要从 rangeAxis in 缩小jFreeChart
,所以我为此目的使用了 zoomRange 。
但我不明白什么是lowerPercent
and upperPercent
?
我想设置 rangeAxis,如下图所示。我怎样才能做到这一点?
我试过这个,但不知道应该是什么价值rangeAxis.zoomRange(0,?)
public class Profilee {
double last=0;
ChartFrame frame1;
JFreeChart chart;
ChartUtilities cu=new ChartUtilitiesImpl();
public void generateProfile(double[] pointValue,double[] distance){
ArrayList pv=new ArrayList();
ArrayList dist=new ArrayList();
pv.add(pointValue);
dist.add(distance);
XYSeries series = new XYSeries("");
for(int i=0;i<pointValue.length-1;i++){
series.add(last,pointValue[i]);
last=distance[i];
}
XYDataset xyDataset = new XYSeriesCollection(series);
chart= ChartFactory.createXYAreaChart("Profile View Of Contour", "Distance", "Contour Value", xyDataset, PlotOrientation.VERTICAL, true, true, false);
ValueAxis rangeAxis = chart.getXYPlot().getRangeAxis();
//rangeAxis.setLowerBound(-3);
rangeAxis.zoomRange(0,?); //What should be Value over here?
frame1=new ChartFrame("XYLine Chart",chart);
frame1.setVisible(true);
frame1.setSize(1300,700);
}
public static void main(String ar[]){
Profilee pro=new Profilee();
double[] pv={3,2,3,0,5,-2,10};
double[] dist={1,4,8,12,14,20,24};
pro.generateProfile(pv, dist);
}
private static class ChartUtilitiesImpl extends ChartUtilities {
public ChartUtilitiesImpl() {
}
}
}