JFreeChart和Y轴单位

Question

我有一个StackedXYAreaChart，如下所示：

如何格式化Y轴单位，使它们均匀分布并以一定的间隔显示？例如，代替以1的增量显示单位（例如0, 1, 2, 3, ... 100），我想以10或25的增量（例如，0, 25, 50, 75, 100）显示单位。谢谢！

Answer 1

我找到了解决自己问题的方法。我正在使用CustomTickUnit格式化数字并在后缀中添加单位，例如1000000变为1 GB。

我使用以下代码设置我的刻度单位，将它们均匀分开并适当地格式化它们以使它们非常易读：

public void setupRangeAxis(NumberAxis rangeAxis) {
  final TickUnits standardUnits = new TickUnits();
  standardUnits.add(new CustomTickUnit(1));
  standardUnits.add(new CustomTickUnit(10));
  standardUnits.add(new CustomTickUnit(100));
  standardUnits.add(new CustomTickUnit(1000)); // Kilo
  standardUnits.add(new CustomTickUnit(10000));
  standardUnits.add(new CustomTickUnit(100000));
  standardUnits.add(new CustomTickUnit(1000000)); // Mega
  standardUnits.add(new CustomTickUnit(10000000));
  standardUnits.add(new CustomTickUnit(100000000));
  standardUnits.add(new CustomTickUnit(1000000000)); // Giga
  standardUnits.add(new CustomTickUnit(10000000000L));
  standardUnits.add(new CustomTickUnit(100000000000L));
  standardUnits.add(new CustomTickUnit(1000000000000L)); // Tera
  standardUnits.add(new CustomTickUnit(10000000000000L));
  standardUnits.add(new CustomTickUnit(100000000000000L));
  standardUnits.add(new CustomTickUnit(1000000000000000L)); // Peta
  standardUnits.add(new CustomTickUnit(10000000000000000L));
  standardUnits.add(new CustomTickUnit(100000000000000000L));
  standardUnits.add(new CustomTickUnit(1000000000000000000L)); // Exa
  rangeAxis.setStandardTickUnits(standardUnits);
}

Answer 2

假设NumberAxis，将刻度单位设置为25.有一个相关示例here。

axis.setTickUnit(new NumberTickUnit(25));

Answer 3

CategoryPlot plot = chart.getCategoryPlot();

NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();

rangeAxis.setTickUnit(new NumberTickUnit(300));