Question

我想在水平条形图中显示持续时间。我发现我需要moment.js所以格式hh：mm可以使用，但我不能让水平栏工作。我试图从How to feed hour and minute data into chartJS复制代码并将其更改为我想要的但不起作用。

代码：

var result = [{ x: "150:00", y: "bar 1" }, { x: "19:00", y: "bar 2" }, { x: "20:00", y: "bar 3" }, { x: "22:00", y: "bar 4" }];

    // parse labels and data
    var labels = result.map(e => moment(e.x, 'HH:mm'));
    var data = result.map(e => +e.y);

    var ctx = document.getElementById("MeSeStatusCanvas").getContext('2d');
    var myChart = new Chart(ctx, {
        type: 'horizontalBar',
        data: {
            labels: labels,
            datasets: [{
                label: 'Voltage Fluctuation',
                data: data,
                borderWidth: 1
            }]
        },
        options: {
            scales: {
                xAxes: [{
                    type: 'time',
                    time: {
                        unit: 'hour',
                        displayFormats: {
                            hour: 'HH:mm'
                        }
                    }
                }]
            },
        }
    });

有人可以帮帮我吗？

提前致谢

Answer 1

<强>ꜰɪʀꜱᴛ

解析标签和数据，如下所示：

var labels = result.map(e => e.y);
var data = result.map(e => moment(e.x, 'HH:mm'));

<强>ꜱᴇᴄᴏɴᴅ

使用 yLabels 属性而不是labels （在data对象内），因此：

...
data: {
      yLabels: labels,
      ...

ᴡᴏʀᴋɪɴɢᴡᴏʀᴋɪɴɢxᴀᴍᴘʟᴇᴀᴍᴘʟᴇ

var result = [{ x: "150:00", y: "bar 1" }, { x: "19:00", y: "bar 2" }, { x: "20:00", y: "bar 3" }, { x: "22:00", y: "bar 4" }];

// parse labels and data
var labels = result.map(e => e.y);
var data = result.map(e => moment(e.x, 'HH:mm'));

var ctx = document.getElementById("MeSeStatusCanvas").getContext('2d');
var myChart = new Chart(ctx, {
   type: 'horizontalBar',
   data: {
      yLabels: labels,
      datasets: [{
         label: 'Voltage Fluctuation',
         data: data,
         borderWidth: 1
      }]
   },
   options: {
      scales: {
         xAxes: [{
            type: 'time',
            time: {
               unit: 'hour',
               displayFormats: {
                  hour: 'HH:mm'
               },
               /* (required to show first bar)
               	set min prop, less than the minimum value of data.
               	in this case minimum data value is '15:00', so we set '14:00'
                */
               min: moment('14:00', 'HH:mm')
            }
         }]
      }
   }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.0/Chart.min.js"></script>
<canvas id="MeSeStatusCanvas"></canvas>

hh：mm轴上的chart.js和Y轴上的文本标签

1 个答案: