/**
* Creates a {@link DefaultCategoryDataset} for rendering a graph from a set of {@link
* MultiStageTimeSeries}.
*/
protected DefaultCategoryDataset createDataset() {
float[][] dataPoints = new float[series.size()][];
for (int i = 0; i < series.size(); i++)
dataPoints[i] = series.get(i).pick(timeScale).getHistory();
int dataLength = dataPoints[0].length;
for (float[] dataPoint : dataPoints) assert dataLength == dataPoint.length;
DefaultCategoryDataset ds = new DefaultCategoryDataset();
DateFormat format = timeScale.createDateFormat();
Date dt = new Date(System.currentTimeMillis() - timeScale.tick * dataLength);
for (int i = dataLength - 1; i >= 0; i--) {
dt = new Date(dt.getTime() + timeScale.tick);
String l = format.format(dt);
for (int j = 0; j < dataPoints.length; j++)
ds.addValue(dataPoints[j][i], series.get(j).title.toString(), l);
}
return ds;
}
