JFreeChart - 时间序列和CandleStick在同一张图上

Question

我试图在JFreeChart中生成一个由叠加的烛台图表和时间序列图组成的单个图表。 （像这样的小）

candlestick trend overlay http://www.prices-oil.org/wp-content/uploads/2009/04/oil1stapril.jpg

我曾尝试创建烛台图表，然后添加额外的XY系列和它渲染器，但是这导致的 org.jfree.data.xy.XYSeriesCollection cannot be cast to org.jfree.data.xy.OHLCDataset

的片断运行时错误我代码如下

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; 
} 

任何意见将受到欢迎

Answer 1

此我S可能使用JFreeChart的，关键是要创建一个额外的数据集和渲染

您需要创建一个新的TimeSeriesCollection来保存数据，另外三个系列

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); 

然后将数据添加到TimeSeries像平常一样。

然后，您将需要otherDataSet在OhlcChart地图它在原来的情节（mapDatasetToRangeAxis）添加到Plot到同一轴线上，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); 

下面是使用OHLCDataset而不是一个实例一个BoxAndWhiskerXYDataset