如何使用chart.js（v2.0-dev）反转y轴 [英] How do I invert an y-axis using chart.js (v2.0-dev)

问题描述

我正在创建带有2个y轴的折线图。这些轴之一具有两个数据集，但都在0-100范围内。数字越大越好。第二个y轴的范围通常较小（通常为个位数），并且最佳结果是1。

I am creating line charts with 2 y-axes. one of those axes has two datasets but both run from the range of 0-100. The higher number being the better one. The second y-axis is usually lower in range (often in the single digits) and the best result is 1.

如何反转第二个y轴，以便1是图表的顶部吗？

How can I invert the second y-axis so that 1 is at the top of the chart?

（我会尝试自己找到一个解决方案，但在chart.js中的5k +行处，可能需要一段时间）

(I will try to find a solution myself, but at 5k+ lines in chart.js, it might take a while )

谢谢^ _ ^

推荐答案

图表js的Dev 2.0支持选项，可以在设置轴时反转刻度线，这样您对第二个轴的声明将变为

Dev 2.0 of chart js supports an option to reverse the ticks when setting up the axis so your declaration of the second axis would become

{
    type: "invertedLinear", // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
    display: true,
    position: "right",
    id: "y-axis-2",
    ticks: {
        reverse: true
    },
    // grid line settings
    gridLines: {
        drawOnChartArea: false, // only want the grid lines for one axis to show up
    }
}

此处正在执行 https://jsfiddle.net/nwc8ys34/15/

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