我试图在JFreeChart中生成一个图表,该图表由重叠的烛台图表和时间序列图组成。 (有点像这样)
(来源:prices-oil.org)
我尝试创建烛台图,然后添加其他XY系列及其渲染器,但这会导致运行时错误org.jfree.data.xy.XYSeriesCollection cannot be cast to org.jfree.data.xy.OHLCDataset
我的代码片段如下
private XYPlot plot;
private XYSeriesCollection dataTrend;
private XYItemRenderer renderer;
public OhlcChart(BarCollection bars)
{
JFreeChart jfreechart = ChartFactory.createCandlestickChart("FX Trader Prototype", "Time", "Value", getDataset(bars), true);
plot = (XYPlot)jfreechart.getPlot();
plot.setDomainPannable(true);
NumberAxis numberAxis = (NumberAxis)plot.getRangeAxis();
numberAxis.setAutoRangeIncludesZero(false);
numberAxis.setAutoRangeStickyZero(false);
numberAxis.setUpperMargin(0.0D);
numberAxis.setLowerMargin(0.0D);
DateAxis dateAxis = (DateAxis) plot.getDomainAxis();
SimpleDateFormat formatter = new SimpleDateFormat("dd MMM HH:mm.ss");
dateAxis.setDateFormatOverride(formatter);
this.renderer = plot.getRenderer();
Stroke myStroke = new BasicStroke((float) 1.0);
this.renderer = new XYLineAndShapeRenderer();
this.renderer.setSeriesPaint(0, Color.blue);
this.renderer.setSeriesStroke(0, myStroke);
}
public OhlcChart update(Timeseries<Double> ts)
{
Stroke myStroke = new BasicStroke((float) 1.0);
XYLineAndShapeRenderer timeSeriesRenderer = new XYLineAndShapeRenderer();
timeSeriesRenderer.setBaseShapesVisible(false);
timeSeriesRenderer.setSeriesPaint(0, Color.blue);
timeSeriesRenderer.setSeriesStroke(0, myStroke);
UiTimeseries series = new UiTimeseries(ts);
dataTrend.addSeries(series);
plot.setDataset(plot.getDatasetCount()+1, dataTrend);
plot.setRenderer(plot.getDatasetCount()+1, timeSeriesRenderer);
return this;
}
任何建议将不胜感激
最佳答案
使用JFreeChart可以做到这一点,关键是创建一个附加的数据集和渲染器
您将需要创建一个新的TimeSeriesCollection
来保存其他三个系列的数据
TimeSeriesCollection otherDataSet = new TimeSeriesCollection();
TimeSeries ts1 = new TimeSeries("Series 1");
otherDataSet.addSeries(ts1);
TimeSeries ts2 = new TimeSeries("Series 2");
otherDataSet.addSeries(ts2);
TimeSeries ts3 = new TimeSeries("Series 2");
otherDataSet.addSeries(ts3);
然后像往常一样将数据添加到
TimeSeries
中。然后,您需要将
otherDataSet
添加到Plot
中的OhlcChart
中,将其映射到原始图上的同一轴(mapDatasetToRangeAxis
),并提供一个Renderer
//Add the otherDataSet to the plot and map it to the same axis at the original plot
int index = 1;
plot.setDataset(index, otherDataSet);
plot.mapDatasetToRangeAxis(index, 0);
XYItemRenderer renderer2 = new XYLineAndShapeRenderer();
plot.setRenderer(1, renderer2);
plot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);
这是一个使用
OHLCDataset
而不是BoxAndWhiskerXYDataset
的示例关于java - JFreeChart-时间序列和CandleStick在同一图表上,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/12173306/