我需要在图表中设置最小X-tick间隔。我有一个包含1000个条目的数据集,即<0,12>,<5,22>,<10,23>,...,<1000,20>
。在数据集中,X值之间的间隔等于5.在图表中,我想将X-tick间隔设置为100。
我使用此代码,但它不起作用:
NumberAxis range = (NumberAxis)plot.getRangeAxis();
range.setTickUnit(new NumberTickUnit(100));
这是我的代码段:
private JFreeChart createChart(CategoryDataset dataset)
{
final JFreeChart chart = ChartFactory.createAreaChart(
this.title,
"Time",
"Net demand",
dataset,
PlotOrientation.VERTICAL,
true,
true,
false
);
Title t = new TextTitle(this.subtitle);
chart.addSubtitle(t);
int transparency = 95;
Color c = new Color(1, 158, 115, transparency);
final CategoryPlot plot = chart.getCategoryPlot();
CategoryItemRenderer renderer = new CustomRenderer(c);
renderer.setSeriesOutlinePaint(0, Color.black);
renderer.setSeriesOutlineStroke(0, new BasicStroke(0.5f));
renderer.setSeriesPaint(0,c);
plot.setRenderer(renderer);
NumberAxis range = (NumberAxis)plot.getRangeAxis();
range.setTickUnit(new NumberTickUnit(60));
return chart;
}
答案 0 :(得分:6)
您已设置范围轴的刻度单位,即JFreeChart中的y轴。对于x轴,您需要域轴。
NumberAxis xAxis = (NumberAxis) plot.getDomainAxis();
xAxis.setTickUnit(new NumberTickUnit(60));
域和范围术语来自将一组域值映射到一组范围值的函数。事后看来,使用getXAxis()和getYAxis()作为方法名称对于大多数人来说会更清楚......对于JFreeChart 2我可能会改变它。