我正在使用JFreeChart创建XYBarChart并向其中添加多个序列。当前,对于给定的x值和该系列中不同的Y值,它们全部堆叠在一起。
对于给定的x值,可以将每个系列显示为不同的条形吗?
编辑:我将发布代码的相关部分,以用于创建图表以供您参考。
请注意,我不能使用CategoryDataset,因为它不提供域轴上的缩放功能。这是我实施的基本要求。
XYSeriesCollection intervalXYDataSet = new XYSeriesCollection();
int countPlotPoints = populateBandData(intervalXYDataSet, optionList); //optionList is a HashMap<Integer,ArrayList<Integer>> where key = seriesKey, and ArrayList<Integer> builds up the value for each series
if (countPlotPoints == 0) {
print("No options selected.\n");
JOptionPane.showMessageDialog(this, "No Plot Points Were Selected!", "Warning", JOptionPane.WARNING_MESSAGE);
return;
}
/**
* Chart Creation Section
*/
JFreeChart chart = ChartFactory.createXYBarChart(tabTitle, "Frequency Bands", false, "rxlev", intervalXYDataSet, PlotOrientation.VERTICAL, true, true, false);
XYPlot plot = (XYPlot) chart.getPlot();
plot.getRangeAxis().setStandardTickUnits(NumberAxis.createIntegerTickUnits());
plot.getDomainAxis().setAutoRange(true);
//
final XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer();
renderer.setDrawBarOutline(false);
renderer.setShadowVisible(false);
renderer.setMargin(0.2);
renderer.setDefaultShadowsVisible(false);
ChartPanel chartpanel = new ChartPanel(chart);
chartpanel.setDefaultDirectoryForSaveAs(new File(lastAnalyzedPath));
JFrame frame = new JFrame();
frame.setTitle(plotTitle);
frame.add(new JScrollPane(chartpanel));
frame.pack();
frame.setVisible(true);
frame.addWindowListener(new java.awt.event.WindowAdapter() {
@Override
public void windowClosing(java.awt.event.WindowEvent evt) {
try {
System.out.println(":: Clearning Memory ::");
System.out.println("\tFree Memory (Before cleanup): "+Runtime.getRuntime().freeMemory());
Component component = getComponent(0);
if(component instanceof ChartPanel){
JFreeChart chart = ((ChartPanel) component).getChart();
XYPlot plot = (XYPlot) chart.getPlot();
plot = null;
chart = null;
component = null;
}
} finally {
System.runFinalization();
System.gc();
System.out.println("\tFree Memory (Post cleanup): "+Runtime.getRuntime().freeMemory());
}
}
});
Here's a screenshot当前如何显示
最佳答案
编辑使用ClusteredXYBarRenderer
代替XYBarRenderer
。这将绘制相邻的条(而不是StackedBars)并提供缩放功能。ChartFactory
中没有工厂方法来创建ClusteredXYBarRenderer
。
使用以下方法创建条形图。
private static JFreeChart createClusteredChart(String title, String categoryAxisLabel, String valueAxisLabel, IntervalXYDataset dataset) {
NumberAxis domainAxis = new NumberAxis(categoryAxisLabel);
domainAxis.setAutoRangeIncludesZero(false);
ValueAxis valueAxis = new NumberAxis(valueAxisLabel);
XYBarRenderer renderer = new ClusteredXYBarRenderer();
XYPlot plot = new XYPlot(dataset, domainAxis, valueAxis, renderer);
plot.setOrientation(PlotOrientation.VERTICAL);
JFreeChart chart = new JFreeChart(title, JFreeChart.DEFAULT_TITLE_FONT, plot, true);
return chart;
}
您使用的
XYBarRenderer
是正确的。但是我认为您应该使用CategoryDataSet
而不是XYSeriesCollection
。尝试使用下面的数据集代替XYSeriesCollection
。这将产生相邻的条,而不是堆叠的条。private static CategoryDataset createDataset() {
String series1 = "First";
String series2 = "Second";
String series3 = "Third";
String category1 = "Category 1";
String category2 = "Category 2";
String category3 = "Category 3";
String category4 = "Category 4";
String category5 = "Category 5";
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(1.0D, series1, category1);
dataset.addValue(4.0D, series1, category2);
dataset.addValue(3.0D, series1, category3);
dataset.addValue(5.0D, series1, category4);
dataset.addValue(5.0D, series1, category5);
dataset.addValue(5.0D, series2, category1);
dataset.addValue(7.0D, series2, category2);
dataset.addValue(6.0D, series2, category3);
dataset.addValue(8.0D, series2, category4);
dataset.addValue(4.0D, series2, category5);
dataset.addValue(4.0D, series3, category1);
dataset.addValue(3.0D, series3, category2);
dataset.addValue(2.0D, series3, category3);
dataset.addValue(3.0D, series3, category4);
dataset.addValue(6.0D, series3, category5);
return dataset;
}