在谷歌图表纵轴中显示持续时间

Question

使用谷歌图表，我需要以 hh:mm 格式在垂直轴上绘制持续时间。 由于小时值可以大于 24， timeofday是不合适的。

<html>
<head>
    <meta content="text/html;charset=utf-8" http-equiv="Content-Type">
    <meta content="utf-8" http-equiv="encoding">
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
        google.charts.load('current', { 'packages': ['corechart'] });
        google.charts.setOnLoadCallback(drawChart);
        function drawChart() {
            var data = new google.visualization.DataTable();
            data.addColumn('string', 'Topping');
            data.addColumn('timeofday', 'Duration');
            data.addRows([
                ['Me', [23,59,0]],
                ['My Boss', [47,59,0]]
            ]);
            var options = {
                'title': 'How Long We Ate Pizza',
                'width': 400,
                'height': 300,
                'vAxis': { 'format':'HH:mm'}
            };
            var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
            chart.draw(data, options);
        }
    </script>
</head>
<body>
    <div id="chart_div"></div>
</body>
</html>

图表显示了我的老板的23:59 。 如果我将它格式化为字符串，我得到Data column(s) for axis #0 cannot be of type string错误Data column(s) for axis #0 cannot be of type string 。

有什么办法可以处理吗？

Answer 1

从时间值动态构建图表，
首先使用数据视图将 timeofday 转换为分钟

// use calculated column to convert time of day to duration in minutes
var view = new google.visualization.DataView(data);
view.setColumns([0, {
  calc: function (dt, row) {
    // initialize variables
    var minutesFormat = '';
    var minutesValue = 0;
    var timeofday = dt.getValue(row, 1);

    // calculate total minutes
    timeofday.forEach(function (value, index) {
      // determine time part
      switch (index) {
        // hours
        case 0:
          minutesFormat += value;
          minutesValue += (value * 60);
          break;

        // minutes
        case 1:
          minutesFormat += ':' + value;
          minutesValue += value;
          break;

        // seconds
        case 2:
          minutesValue += (value / 60);
          break;

        // miliseconds
        case 3:
          minutesValue += (value / 60000);
          break;
      }
    });

    // build object notation
    return {
      v: minutesValue,
      f: minutesFormat
    };
  },
  label: data.getColumnLabel(1),
  type: 'number'
}]);

然后对于 y 轴刻度，
首先，获取最大分钟数。

// get range of duration in muntes
var range = view.getColumnRange(1);  // range.max

然后我们需要确定四舍五入到 (10, 100, 1000) 的小时数

// determine max number of hours for y-axis
var maxHours = Math.ceil(range.max / 60);
var roundTo = parseInt('1' + Array(maxHours.toFixed(0).length).join('0'));
var maxHours = Math.ceil((range.max / 60) / roundTo) * roundTo;

然后建立我们的蜱...

// build y-axis ticks
var ticks = [];
for (var hour = 0; hour <= maxHours; hour += roundTo) {
  ticks.push({
    v: hour * 60,
    f: hour + ':00'
  });
}

请参阅以下工作片段...

 google.charts.load('current', { packages: ['corechart'] }).then(function () { var data = new google.visualization.DataTable(); data.addColumn('string', 'Topping'); data.addColumn('timeofday', 'Duration'); data.addRows([ ['Me', [23,59,0]], ['My Boss', [47,59,0]] ]); // use calculated column to convert time of day to duration in minutes var view = new google.visualization.DataView(data); view.setColumns([0, { calc: function (dt, row) { // initialize variables var minutesFormat = ''; var minutesValue = 0; var timeofday = dt.getValue(row, 1); // calculate total minutes timeofday.forEach(function (value, index) { // determine time part switch (index) { // hours case 0: minutesFormat += value; minutesValue += (value * 60); break; // minutes case 1: minutesFormat += ':' + value; minutesValue += value; break; // seconds case 2: minutesValue += (value / 60); break; // miliseconds case 3: minutesValue += (value / 60000); break; } }); // build object notation return { v: minutesValue, f: minutesFormat }; }, label: data.getColumnLabel(1), type: 'number' }]); // get range of duration in muntes var range = view.getColumnRange(1); // determine max number of hours for y-axis var maxHours = Math.ceil(range.max / 60); var roundTo = parseInt('1' + Array(maxHours.toFixed(0).length).join('0')); var maxHours = Math.ceil((range.max / 60) / roundTo) * roundTo; // build y-axis ticks var ticks = []; for (var hour = 0; hour <= maxHours; hour += roundTo) { ticks.push({ v: hour * 60, f: hour + ':00' }); } var options = { title: 'How Long We Ate Pizza', width: 400, height: 300, vAxis: { ticks: ticks } }; var chart = new google.visualization.ColumnChart(document.getElementById('chart_div')); chart.draw(view, options); });

 <script src="https://www.gstatic.com/charts/loader.js"></script> <div id="chart_div"></div>

Answer 2

感谢 WhiteHat 评论和这个答案。

添加值和刻度时使用对象表示法。

data.addRows([
    ['Me', { v: 1439, f: '23:59' }],
    ['My Boss', { v: 2879, f: '47:59' }]
]);
var options = {
    'title': 'How Long We Ate Pizza',
    'width': 400,
    'height': 300,
    'vAxis': {
        ticks: [{ v: 720, f: '12:00' }, { v: 1440, f: '24:00' }, { v: 2160, f: '36:00' }, { v: 2880, f: '48:00' }]
    }
};

在谷歌图表纵轴中显示持续时间

问题描述

2 个解决方案

解决方案1
1 2019-12-11 17:35:59

解决方案2
0 已采纳 2019-12-11 17:06:28

在谷歌图表纵轴中显示持续时间

问题描述

2 个解决方案

解决方案1 1 2019-12-11 17:35:59

解决方案2 0 已采纳 2019-12-11 17:06:28

解决方案1
1 2019-12-11 17:35:59

解决方案2
0 已采纳 2019-12-11 17:06:28