如何使用图表JS在垂直条形图中设置y轴值-PHP中文网问答

在此垂直条形图中，y 轴有正值、负值。

我想根据零值上下使用正整数。

我使用的是4.2.1版本

我该怎么办？

垂直图表示例

var MONTHS = [
      "January",
      "February",
      "March",
      "April",
      "May",
      "June",
      "July",
      "August",
      "September",
      "October",
      "November",
      "December",
    ];
    var color = Chart.helpers.color;
    var barChartData = {
      labels: ["January", "February", "March", "April", "May", "June", "July"],
      datasets: [
        {
          label: "Dataset 1",
          backgroundColor: 'rgba(255, 201, 14, 1)',
          borderColor: 'rgba(255, 201, 14, 1)',
          borderWidth: 1,
          data: [
            10,
            20,
            30,
            40,
            50
          ],
        },
        {
          label: "Dataset 2",
          backgroundColor: 'rgba(255, 201, 14, 1)',
          borderColor: 'rgba(255, 201, 14, 1)',
          borderWidth: 1,
          data: [
            -100,
            -200,
            -300,
            -400,
            -500
          ],
        },
      ],
    };

    var ctx = bloodPressureChart;
    new Chart(ctx, {
      type: "bar",
      data: barChartData,
      options: {
        responsive: true,
        legend: {
          position: "top",
        },
        title: {
          display: true,
          text: "Chart.js Bar Chart",
        },
      },
    });

这是我使用图表 JS 的代码。

我的代码图表