Charts.js 中带折线图的堆积条形图

Question

我可以用线条制作标准条形图，但如何用线条制作堆积条形图？

例如，这是我用于带有线条的条形图的代码，我应该进行哪些编辑/更改，以便可以将它与堆叠条形图一起使用？ 这是堆叠条形图https://www.chartjs.org/samples/latest/charts/bar/stacked.html的示例，这是带有线Z5E056C500A1C4B6A75D10的条形图示例/samples/latest/charts/combo-bar-line.html

var ctx = document.getElementById('myChart');
var config = {
    type: 'bar',
  options: {
    legendCallback: function(chart) {
      var text = [];
      text.push('<ul class="' + chart.id + '-legend">');
      var data = chart.data;
      var datasets = data.datasets;
      if (datasets.length) {
        for (var i = 0; i < datasets.length; ++i) {
            text.push('<li>');
            if (datasets[i].type=='line') {
            text.push('<span class="'+datasets[i].type+'" style="background-color:' + datasets[i].backgroundColor + '"></span>');
          } else {
            text.push('<span class="'+datasets[i].type+'" style="background-color:' + datasets[i].backgroundColor + '"></span>');
          }
          text.push(datasets[i].label);
          text.push('</li>');
        }
      }
      text.push('</ul>');
      return text.join('');
    },
    legend: {
      display: false,
    },
    scales: {
      xAxes: [{
        type: "category",
        id: "axis-bar",
      }, {
        type: "time",
        id: "axis-time",
        display: false,
      }, ],
    },
  },
  data: {
    labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
    datasets: [{
      label: "Dataset1",
      type: "line",
      backgroundColor: "#0000FF",
      borderColor: "#0000FF",
      borderWidth: 1,
      fill: false,
      xAxisID: "axis-time",
      data: [12296,12381,9141,24203,21987,21801,65394,91892,57645,44637,22631,17502]
    },{
      label: "Dataset2",
      type: "bar",
      backgroundColor: "#ff0000",
      borderColor: "#ff0000",
      borderWidth: 1,
      fill: true,
      xAxisID: "axis-bar",
      data: [299405,244029,247191,329711,273855,441914,426271,471912,374388,366864,326155,277442]
    }]
  },

};

var myChart = new Chart(ctx, config);
var legend = myChart.generateLegend();
document.getElementById("legend").innerHTML = legend;

Answer 1

请参阅 Chart.js 文档以供参考： https://www.chartjs.org/docs/latest/charts/bar.html#stacked-bar-chart

---

假设您添加了另一个数据集：

{
  label: "Dataset3",
  type: "bar",
  backgroundColor: "#00ff00",
  borderColor: "#00ff00",
  borderWidth: 1,
  fill: true,
  xAxisID: "axis-bar",
  data: [ 149703, 122015, 123596, 164856, 136928, 220957, 213136, 235956, 187194, 183432, 163078, 138721 ]
}

解决方案

您需要向 X 和 Y 轴刻度添加额外的配置：

scales: {
  xAxes: [ { stacked: true }],
  yAxes: [ { stacked: true }]
}

例子

 var ctx = document.getElementById("myChart").getContext('2d'); var myChart = new Chart(ctx, { type: 'bar', data: { labels: ["< 1","1 - 2","3 - 4","5 - 9","10 - 14","15 - 19","20 - 24","25 - 29","> - 29"], datasets: [{ label: "Dataset1", type: "line", backgroundColor: "#0000FF", borderColor: "#0000FF", borderWidth: 1, fill: false, yAxisID: "axis-time", data: [12296,12381,9141,24203,21987,21801,65394,91892,57645,44637,22631,17502] },{ label: "Dataset2", type: "bar", backgroundColor: "#ff0000", borderColor: "#ff0000", borderWidth: 1, fill: true, yAxisID: "axis-bar", data: [ 149703, 122015, 123596, 164856, 136928, 220957, 213136, 235956, 187194, 183432, 163078, 138721 ] },{ label: "Dataset3", type: "bar", backgroundColor: "#00ff00", borderColor: "#00ff00", borderWidth: 1, fill: true, yAxisID: "axis-bar", data: [ 149703, 122015, 123596, 164856, 136928, 220957, 213136, 235956, 187194, 183432, 163078, 138721 ] }], }, options: { tooltips: { displayColors: true, }, scales: { xAxes: [{ stacked: true, }], yAxes: [{ stacked: true, id: 'axis-bar' }, { stacked: true, id: 'axis-time', display: false, }] }, responsive: true, maintainAspectRatio: false, legend: { display: false }, legendCallback: function(chart) { var text = []; text.push('<ul class="' + chart.id + '-legend">'); var data = chart.data; var datasets = data.datasets; if (datasets.length) { for (var i = 0; i < datasets.length; ++i) { text.push('<li>'); if (datasets[i].type=='line') { text.push('<span class="'+datasets[i].type+'" style="background-color:' + datasets[i].backgroundColor + '"></span>'); } else { text.push('<span class="'+datasets[i].type+'" style="background-color:' + datasets[i].backgroundColor + '"></span>'); } text.push(datasets[i].label); text.push('</li>'); } } text.push('</ul>'); return text.join(''); } } }); var legend = myChart.generateLegend(); document.getElementById("legend").innerHTML = legend;

 canvas{ background:#fff; height:400px; }

 <script src="https://www.chartjs.org/dist/2.9.3/Chart.min.js"></script> <div class="wrapper"> <canvas id="myChart"></canvas> <div id="legend"></div> </div>

我还创建了一个 CodePen，其代码与显示堆叠条形图和折线图的代码相同： https://codepen.io/pzi/pen/GRoObmq