y 轴上间距不均匀的自定义百分比阈值

Question

我的问题：使用 jfreechart，我需要在 y 轴上显示间隔不均匀的百分比阈值。例如，我的 y 轴上唯一的标签应该是阈值，如下所示；所有其他纵坐标应为空白：

-
93%
85%
78%
72%
66%
-
50%
-
-
-
-
-

我目前正在使用此代码片段显示百分比，但这只会创建一个均匀分布的百分比轴：

    CategoryPlot plot = (CategoryPlot) chart.getPlot();

    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    DecimalFormat pctFormat = new DecimalFormat("#.0%");
    rangeAxis.setNumberFormatOverride(pctFormat);

如有任何帮助，我们将不胜感激！

Answer 1

这是一个有点乱七八糟的答案，我会对任何以好的方式获得相同结果的答案投赞成票。但它有效 - 这就是我所做的。

首先，我创建了一个要使用的双精度值列表：

public static List<Double> m_lPercentageValuesForY = Arrays.asList(0.1,0.2,0.3,0.4,0.5,0.58,0.66,0.70,0.74,0.78,0.82,0.95,1.0);

然后我覆盖 NumberAxis 中的 refreshTicks 方法，首先将所有默认刻度设置为 Ticktype.MINOR，然后使用 Ticktype.MAJOR 添加和创建自定义刻度：

    NumberAxis axisLeft = new NumberAxis(plot.getRangeAxis().getLabel()) {
        @Override
        public List refreshTicks(
                Graphics2D g2, 
                AxisState state,
                Rectangle2D dataArea, 
                RectangleEdge edge) {

            List defaultTicks = super.refreshTicks(g2, state, dataArea, edge);
            List customTicks = new ArrayList();

            for (Object aTick : defaultTicks) {
                NumberTick currenttick = (NumberTick) aTick;

                customTicks.add(new NumberTick(
                        TickType.MINOR, 
                        currenttick.getValue(), 
                        "",  //empty
                        currenttick.getTextAnchor(), 
                        currenttick.getRotationAnchor(),
                        currenttick.getAngle()));
            }
            NumberTick aTick = (NumberTick) defaultTicks.get(0);
            for (double dTest : m_lPercentageValuesForY) {
                customTicks.add(new NumberTick(
                        TickType.MAJOR, 
                        dTest, 
                        String.format("%.0f%%", dTest * 100), //only wanted values are set to major
                        aTick.getTextAnchor(), 
                        aTick.getRotationAnchor(),
                        aTick.getAngle()));
            }
            return customTicks;
        }
    };
    plot.setRangeAxis(axisLeft);

y 轴上间距不均匀的自定义百分比阈值

Custom percentage thresholds on y-axis with uneven spacing

java

customization

label

jfreechart

percentage