如何使用dc.js和d3.js顯示堆積條形圖的值？

Question

基於這個問題，我能夠使用帶有標簽的dc.js和d3.js創建條形圖。 但是，我將條形圖轉換為堆積條形圖（基於此文檔），並且我很難顯示每個堆棧的標簽。

例如，下圖中的每個堆棧都應顯示數字，但它顯示的是[object Object]

請參閱下面的代碼和codepen

使用Javascript

var data = [{Category: "A", ID: "1A"}, {Category: "A", ID: "1A"}, {Category: "A", ID: "1A"}, {Category: "A", ID: "2B"}, {Category: "A", ID: "2B"}, {Category: "B", ID: "1A"}, {Category: "B", ID: "1A"}, {Category: "B", ID: "1A"}, {Category: "B", ID: "2B"}, {Category: "B", ID: "3C"}, {Category: "B", ID: "3C"}, {Category: "B", ID: "3C"}, {Category: "B", ID: "4D"}, {Category: "C", ID: "1A"}, {Category: "C", ID: "2B"}, {Category: "C", ID: "3C"}, {Category: "C", ID: "4D"}, {Category: "C", ID: "4D"}, {Category: "C", ID: "5E"}];

var ndx = crossfilter(data);

var XDimension = ndx.dimension(function (d) {return d.Category;});



var YDimension = XDimension.group().reduce(
    function reduceAdd(p, d) {
      p[d.ID] = (p[d.ID]|| 0) + 1;
      return p;
    },
    function reduceRemove(p, d) {
      p[d.ID] = (p[d.ID]|| 0) -1;
      return p;
    },
    function reduceInitial() {
      return {};})


dc.barChart("#Chart")
    .width(480).height(300)
    .dimension(XDimension)
    .group(YDimension,"1A",function(d) {return d.value["1A"];})
    .stack(YDimension,"2B",function(d) {return d.value["2B"];})
    .stack(YDimension,"3C",function(d) {return d.value["3C"];})
    .stack(YDimension,"4D",function(d) {return d.value["4D"];})
    .stack(YDimension,"5E",function(d) {return d.value["5E"];})
    .transitionDuration(500)
    .xUnits(dc.units.ordinal)
    .x(d3.scale.ordinal().domain(XDimension))
    .renderlet(function (chart) {

    //Check if labels exist
    var gLabels = chart.select(".labels");
    if (gLabels.empty()){
        gLabels = chart.select(".chart-body").append('g').classed('labels', true);
    }

    var gLabelsData = gLabels.selectAll("text").data(chart.selectAll(".bar")[0]);

    gLabelsData.exit().remove(); //Remove unused elements

    gLabelsData.enter().append("text") //Add new elements

    gLabelsData
    .attr('text-anchor', 'middle')
    .attr('fill', 'white')
    .text(function(d){
        text_object =  d3.select(d).data()[0].data.value
        return text_object
    })
    .attr('x', function(d){ 
        return +d.getAttribute('x') + (d.getAttribute('width')/2); 
    })
    .attr('y', function(d){ return +d.getAttribute('y') + 15; })
    .attr('style', function(d){
        if (+d.getAttribute('height') < 18) return "display:none";
    });

})


dc.renderAll();

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/dc/1.7.0/dc.css" media="screen">
<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://rawgithub.com/NickQiZhu/dc.js/master/web/js/crossfilter.js"></script>
<script src="https://d3js.org/d3.v3.min.js"></script>
<body>
    <div id='Chart'></div>
</body>

Answer 1

通常我在這些情況下做的是在相關的行上放置一個斷點並四處查看該對象是否包含我想要的其他數據。

看起來你可以使用.datum().y在這里：

    text_object =  d3.select(d).datum().y

http://codepen.io/gordonwoodhull/pen/EgNvNr?editors=1010

這仍然是一種奇怪的代碼（使用DOM元素作為一些其他元素的數據連接的數據非常hacky）但希望這會讓你感動。

如何使用dc.js和d3.js顯示堆積條形圖的值？

問題描述

1 個解決方案

解決方案1
3 已采納 2016-09-20 22:50:00

如何使用dc.js和d3.js顯示堆積條形圖的值？

問題描述

1 個解決方案

解決方案1 3 已采納 2016-09-20 22:50:00

解決方案1
3 已采納 2016-09-20 22:50:00