Chartjs 2.7.3：在正确的X位置轴上设置Y数据

Question

data: {
            labels: ['29 Oct, 18', '30 Oct, 18', '02 Nov, 18', '14 Nov, 18', '15 Nov, 18', '19 Nov, 18', '20 Nov, 18', '28 Nov, 18'],
            datasets: [{
                pointRadius: 0,
                label: 'Positive',
                lineTension: 0, 
                data: [{'x': '15 Nov, 18', 'y': 18636}],
                borderWidth: 1,
                backgroundColor: 'rgba(0, 255, 0, 0.5)', 
            },{
                pointRadius: 0,
                label: 'Negative',
                lineTension: 0, 
                data: [{'x': '29 Oct, 18', 'y': -20480}, {'x': '30 Oct, 18', 'y': -284}, {'x': '02 Nov, 18', 'y': -1625}, {'x': '14 Nov, 18', 'y': -6622}, {'x': '15 Nov, 18', 'y': -12991}, {'x': '19 Nov, 18', 'y': -1645}, {'x': '20 Nov, 18', 'y': -1230}, {'x': '28 Nov, 18', 'y': -39612}],
                borderWidth: 1,
                backgroundColor: 'rgba(255, 0, 0, 0.5)', 
            }]
        },

问题是绿色条在错误的x位置。它目前位于'29 okt'，但我将其标记为'15 nov'

如何将这些数据集设置为正确的x位置

Answer 1

由于您指定了x/y数据集的坐标，因此您必须在图表选项中设置xAxes比例类型time。

var options = {
  scales: {
    xAxes: [
      {
        type: "time"
      }
    ]
  }
};

有关所有可能的配置，请参阅官方文档或检查以下工作示例中使用的选项。

重要提示：您必须将数据集中的日期格式更改为类似的内容，'YYYY-MM-DD'否则moment会引发此警告。

弃用警告：提供的值不是公认的 RFC2822 或 ISO 格式。moment 构造回退到 js Date()，这在所有浏览器和版本中都不可靠。

var options = {
  scales: {
    xAxes: [
      {
        type: "time"
      }
    ]
  }
};

var data = {
  labels: [
    "2018-10-29",
    "2018-10-30",
    "2018-11-02",
    "2018-11-14",
    "2018-11-15",
    "2018-11-19",
    "2018-11-20",
    "2018-11-28"
  ],
  datasets: [{
      pointRadius: 0,
      label: "Positive",
      lineTension: 0,
      data: [{
        x: "2018-11-15",
        y: 18636
      }],
      borderWidth: 1,
      backgroundColor: "rgba(0, 255, 0, 0.5)"
    },
    {
      pointRadius: 0,
      label: "Negative",
      lineTension: 0,
      data: [{
          x: "2018-10-29",
          y: -20480
        },
        {
          x: "2018-10-30",
          y: -284
        },
        {
          x: "2018-11-02",
          y: -1625
        },
        {
          x: "2018-11-14",
          y: -6622
        },
        {
          x: "2018-11-15",
          y: -12991
        },
        {
          x: "2018-11-19",
          y: -1645
        },
        {
          x: "2018-11-20",
          y: -1230
        },
        {
          x: "2018-11-28",
          y: -39612
        }
      ],
      borderWidth: 1,
      backgroundColor: "rgba(255, 0, 0, 0.5)"
    }
  ]
};
var options = {
  scales: {
    xAxes: [{
      type: "time",
      distribution: 'series',
      time: {
        displayFormats: {
          day: 'D MMM, YY'
        }
      },
      ticks: {
        source: "labels"
      },
      gridLines: {
        display: false
      }
    }]
  }
};

var ctx = document.getElementById("myChart").getContext("2d");

var myBarChart = new Chart(ctx, {
  type: "bar",
  data: data,
  options: options
});