Question

我想在条形图的每个方框上添加数据标签，但无法弄清楚如何操作。我在网上找到的所有示例都是从简单数组中获取数据，而不是像我那样从外部获取JSON文件。

这是我的代码：

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.bar {
  fill: steelblue;
}

.x.axis path {
  display: none;
}

</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1);

var y = d3.scale.linear()
    .rangeRound([height, 0]);

var color = d3.scale.ordinal()
    .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    //.scale(y)
    .orient("left")
    .tickFormat(d3.format(".2s"));

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

d3.json("data.json", function(error, data) {
  if (error) throw error;

  color.domain(d3.keys(data[0]).filter(function(key) { return key !== "Brand"; }));

  data.forEach(function(d) {
    var y0 = 0;
    d.stores = color.domain().map(function(name) { return {name: name, y0: y0, y1: y0 += +d[name]}; });
    d.total = d.stores[d.stores.length - 1].y1;
  });

  data.sort(function(a, b) { return b.total - a.total; });

  x.domain(data.map(function(d) { return d.Brand; }));
  y.domain([0, d3.max(data, function(d) { return d.total; })]);

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

  var brand = svg.selectAll(".brand")
      .data(data)
    .enter().append("g")
      .attr("class", "g")
      .attr("transform", function(d) { return "translate(" + x(d.Brand) + ",0)"; });

  brand.selectAll("rect")
      .data(function(d) { return d.stores; })
    .enter().append("rect")
      .attr("width", x.rangeBand())
      .attr("y", function(d) { return y(d.y1); })
      .attr("height", function(d) { return y(d.y0) - y(d.y1); })
      .style("fill", function(d) { return color(d.name); });

  var legend = svg.selectAll(".legend")
      .data(color.domain().slice().reverse())
    .enter().append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });

  legend.append("rect")
      .attr("x", width - 18)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);

  legend.append("text")
      .attr("x", width - 24)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "end")
      .text(function(d) { return d; });

});

</script>

data.json

[
    {
        "Brand": "A",
        "LAST 3 MONTHS": "22",
        "LAST MONTH": "15",
        "THIS YEAR": "36",
        "ALL STORES": "72"
    },
    {
        "Brand": "B",
        "LAST 3 MONTHS": "10",
        "LAST MONTH": "24",
        "THIS YEAR": "15",
        "ALL STORES": "61"
    },
    {
        "Brand": "C",
        "LAST 3 MONTHS": "10",
        "LAST MONTH": "11",
        "THIS YEAR": "23",
        "ALL STORES": "67"
    },
    {
        "Brand": "D",
        "LAST 3 MONTHS": "10",
        "LAST MONTH": "17",
        "THIS YEAR": "21",
        "ALL STORES": "81"
    },
    {
        "Brand": "E",
        "LAST 3 MONTHS": "10",
        "LAST MONTH": "31",
        "THIS YEAR": "51",
        "ALL STORES": "92"
    },
    {
        "Brand": "F",
        "LAST 3 MONTHS": "10",
        "LAST MONTH": "27",
        "THIS YEAR": "35",
        "ALL STORES": "76"
    },
    {
        "Brand": "G",
        "LAST 3 MONTHS": "10",
        "LAST MONTH": "23",
        "THIS YEAR": "19",
        "ALL STORES": "59"
    },
    {
        "Brand": "H",
        "LAST 3 MONTHS": "32",
        "LAST MONTH": "27",
        "THIS YEAR": "15",
        "ALL STORES": "45"
    }
]

如何在条形图中的每个方框上显示数据标签？（如：第一个栏上的22,15,36,72等）。

我想在所有酒吧上查看最终视图，例如此图片中的第一个栏： https://dl.dropboxusercontent.com/u/58490833/Yollanan%20Dosyalar/stackedbar.jpg

Answer 1

执行与所有矩形相同的代码..但是您必须将原始对象与其一起传递给读取值，或者您可以从父节点获取它，如此

brand.selectAll("text")
  .data(function(d) { return d.stores; })
  .enter().append("text")
  .attr("y", function(d) { return y(d.y1)+10; })
  .attr("x", x.rangeBand()/2)
  .attr("text-anchor","middle")
  .style("fill",'#fff')
  .text(function(d) { return d3.select(this)[0][0].parentNode.__data__[d.name]; });

这里是fiddle，解决方案希望这是你需要的......

堆叠垂直条形图标签 - D3.js

1 个答案: