dc.js有两个维度的序数堆积条形图，显示NaN值并且没有堆积条形

1 回答

• 0

  我在你的代码中发现了一些错误 . 工作解决方案位于隐藏片段下方和此pen中 .

  首先，您应该以这种方式定义 YDimension ：

  var YDimension = XDimension.group().reduce(
    function reduceAdd(p, d) {
      p[d.Subject] = (p[d.Subject]|| 0) + d.Score;
      return p;
    },
    function reduceRemove(p, d) {
      p[d.Subject] = (p[d.Subject]|| 0) - d.Score;
      return p;
    },
    function reduceInitial() {
      return {};})
  

  在这里，您可以计算出适合主题的人数 .

  重写 sel_stack 功能：

  function sel_stack(subjectName) {
    return function(dataItem) {
      return dataItem.value[subjectName];
    };
  }
  

  像这样在循环中调用 chart.stack 函数：

  var subjects = ['Maths', 'Science', 'History'];
  ...
  for(var i = 0; i < subjects.length - 1; ++i) {
    chart.stack(
      YDimension,
      subjects[i],
      sel_stack(subjects[i])
    );
  }
  

  var data = [ {"Name":"Dani","Subject":"Maths","Score":60}, {"Name":"Dani","Subject":"Science","Score":80}, {"Name":"Dani","Subject":"History","Score":70},
  {"Name":"Kelly","Subject":"Maths","Score":90}, {"Name":"Kelly","Subject":"Science","Score":100}, {"Name":"Kelly","Subject":"History","Score":55},
  {"Name":"Sara","Subject":"Maths","Score":100}, {"Name":"Sara","Subject":"Science","Score":65}, {"Name":"Sara","Subject":"History","Score":60},
  {"Name":"James","Subject":"Maths","Score":70}, {"Name":"James","Subject":"Science","Score":80}, {"Name":"James","Subject":"History","Score":90},
  {"Name":"Mike","Subject":"Maths","Score":90}, {"Name":"Mike","Subject":"Science","Score":75}, {"Name":"Mike","Subject":"History","Score":80} ];
  var subjects = ['Maths', 'Science', 'History'];
  
  var chart = dc.barChart("#test");
  
  data.forEach(function(x) {
    x.Marks = +x.Marks;
  });
  var ndx = crossfilter(data);
  
  var XDimension = ndx.dimension(function (d) {return d.Name;});
  
  var YDimension = XDimension.group().reduce(
    function reduceAdd(p, d) {
      p[d.Subject] = (p[d.Subject]|| 0) + d.Score;
      return p;
    },
    function reduceRemove(p, d) {
      p[d.Subject] = (p[d.Subject]|| 0) - d.Score;
      return p;
    },
    function reduceInitial() {
      return {};})
  
  function sel_stack(subjectName) {
    return function(dataItem) {
      return dataItem.value[subjectName];
    };
  }
  
  chart
    .width(768)
    .height(480)
    .dimension(XDimension)
    .group(YDimension, "History", sel_stack('History'))
    .transitionDuration(500)
    .xUnits(dc.units.ordinal)
    .x(d3.scale.ordinal().domain(XDimension))
    .margins({left: 80, top: 20, right: 10, bottom: 20})
    .brushOn(false)
    .clipPadding(20)
    .title(function(d) {
    return d.key + '[' + this.layer + ']: ' + d.value[this.layer];
  }).renderLabel(true);
  
  chart.legend(dc.legend());
  
  dc.override(chart, 'legendables', function() {
    var items = chart._legendables();
    return items.reverse();
  });
  
  for(var i = 0; i < subjects.length - 1; ++i) {
    chart.stack(
      YDimension,
      subjects[i],
      sel_stack(subjects[i])
    );
  }
  
  chart.render();
  

  .dc-chart path.dc-symbol, .dc-legend g.dc-legend-item.fadeout {
    fill-opacity: 0.5;
    stroke-opacity: 0.5; }
  
  div.dc-chart {
    float: left; }
  
  .dc-chart rect.bar {
    stroke: none;
    cursor: pointer; }
    .dc-chart rect.bar:hover {
      fill-opacity: .5; }
  
  .dc-chart rect.deselected {
    stroke: none;
    fill: #ccc; }
  
  .dc-chart .pie-slice {
    fill: #fff;
    font-size: 12px;
    cursor: pointer; }
    .dc-chart .pie-slice.external {
      fill: #000; }
    .dc-chart .pie-slice :hover, .dc-chart .pie-slice.highlight {
      fill-opacity: .8; }
  
  .dc-chart .pie-path {
    fill: none;
    stroke-width: 2px;
    stroke: #000;
    opacity: 0.4; }
  
  .dc-chart .selected path, .dc-chart .selected circle {
    stroke-width: 3;
    stroke: #ccc;
    fill-opacity: 1; }
  
  .dc-chart .deselected path, .dc-chart .deselected circle {
    stroke: none;
    fill-opacity: .5;
    fill: #ccc; }
  
  .dc-chart .axis path, .dc-chart .axis line {
    fill: none;
    stroke: #000;
    shape-rendering: crispEdges; }
  
  .dc-chart .axis text {
    font: 10px sans-serif; }
  
  .dc-chart .grid-line, .dc-chart .axis .grid-line, .dc-chart .grid-line line, .dc-chart .axis .grid-line line {
    fill: none;
    stroke: #ccc;
    opacity: .5;
    shape-rendering: crispEdges; }
  
  .dc-chart .brush rect.background {
    z-index: -999; }
  
  .dc-chart .brush rect.extent {
    fill: #4682b4;
    fill-opacity: .125; }
  
  .dc-chart .brush .resize path {
    fill: #eee;
    stroke: #666; }
  
  .dc-chart path.line {
    fill: none;
    stroke-width: 1.5px; }
  
  .dc-chart path.area {
    fill-opacity: .3;
    stroke: none; }
  
  .dc-chart path.highlight {
    stroke-width: 3;
    fill-opacity: 1;
    stroke-opacity: 1; }
  
  .dc-chart g.state {
    cursor: pointer; }
    .dc-chart g.state :hover {
      fill-opacity: .8; }
    .dc-chart g.state path {
      stroke: #fff; }
  
  .dc-chart g.deselected path {
    fill: #808080; }
  
  .dc-chart g.deselected text {
    display: none; }
  
  .dc-chart g.row rect {
    fill-opacity: 0.8;
    cursor: pointer; }
    .dc-chart g.row rect:hover {
      fill-opacity: 0.6; }
  
  .dc-chart g.row text {
    fill: #fff;
    font-size: 12px;
    cursor: pointer; }
  
  .dc-chart g.dc-tooltip path {
    fill: none;
    stroke: #808080;
    stroke-opacity: .8; }
  
  .dc-chart g.county path {
    stroke: #fff;
    fill: none; }
  
  .dc-chart g.debug rect {
    fill: #00f;
    fill-opacity: .2; }
  
  .dc-chart g.axis text {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    pointer-events: none; }
  
  .dc-chart .node {
    font-size: 0.7em;
    cursor: pointer; }
    .dc-chart .node :hover {
      fill-opacity: .8; }
  
  .dc-chart .bubble {
    stroke: none;
    fill-opacity: 0.6; }
  
  .dc-chart .highlight {
    fill-opacity: 1;
    stroke-opacity: 1; }
  
  .dc-chart .fadeout {
    fill-opacity: 0.2;
    stroke-opacity: 0.2; }
  
  .dc-chart .box text {
    font: 10px sans-serif;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    pointer-events: none; }
  
  .dc-chart .box line, .dc-chart .box circle {
    fill: #fff; }
  
  .dc-chart .box rect, .dc-chart .box line, .dc-chart .box circle {
    stroke: #000;
    stroke-width: 1.5px; }
  
  .dc-chart .box .center {
    stroke-dasharray: 3, 3; }
  
  .dc-chart .box .outlier {
    fill: none;
    stroke: #ccc; }
  
  .dc-chart .box.deselected {
    opacity: 0.5; }
    .dc-chart .box.deselected .box {
      fill: #ccc; }
  
  .dc-chart .symbol {
    stroke: none; }
  
  .dc-chart .heatmap .box-group.deselected rect {
    stroke: none;
    fill-opacity: 0.5;
    fill: #ccc; }
  
  .dc-chart .heatmap g.axis text {
    pointer-events: all;
    cursor: pointer; }
  
  .dc-chart .empty-chart .pie-slice {
    cursor: default; }
    .dc-chart .empty-chart .pie-slice path {
      fill: #fee;
      cursor: default; }
  
  .dc-chart circle.dot {
    stroke: none; }
  
  .dc-data-count {
    float: right;
    margin-top: 15px;
    margin-right: 15px; }
    .dc-data-count .filter-count, .dc-data-count .total-count {
      color: #3182bd;
      font-weight: bold; }
  
  .dc-legend {
    font-size: 11px; }
    .dc-legend .dc-legend-item {
      cursor: pointer; }
  
  .dc-hard .number-display {
    float: none; }
  

  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.js"></script>
  <script src="https://rawgithub.com/NickQiZhu/dc.js/master/web/js/crossfilter.js"></script>
  <script src="https://cdnjs.site44.com/dc3.js"></script>
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <body>
      <div id='test'></div>
  </body>
  

  回复于 2024-05-04T05:55:28+08:00