Question

我是D3.js.的新手。我正在尝试使用它构建一个可排序的条形图。在我的代码中，条形图正确排序但每个条形图上的标签都没有排序。我无法找出错误在哪里？

    <!DOCTYPE html>
<meta charset="utf-8">
<style>
.bar{
fill:steelblue;
fill-opacity: .9;
} 

.text {
  fill: green;
}
.bar:hover {
  fill: #F18E18;
}

.axis {
  font: 10px sans-serif;
}

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

.x.axis path {
  display: none;
}
label {
  position: absolute;
  top: 10px;
  right: 10px;
}

</style>
<body>
<label><input type="checkbox"> Sort values</label>

<script src="http://d3js.org/d3.v3.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()
    .range([height, 0]);

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

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .ticks(20, ".");

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.tsv("humanweight.tsv", type, function(error, data) {

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

  svg.append("text")
    .attr("x", width / 2 )
    .attr("y", 0)
    .style("text-anchor", "middle")
    .text("Human Age-Fatness");

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis)
    .append("text")
      .attr("x",900)
      .style("text-anchor", "start")
      .text("Age");

  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 8)
      .attr("dy", ".71em")
      .style("text-anchor", "middle")
      .text("Fatness");

  svg.selectAll(".bar")
      .data(data)
      .enter()
      .append("rect")
      .attr("class", "bar")
      .transition().delay(function(d,i){return i*50;})
      .duration(700)
      .attr("x", function(d) { return x(d.age); })
      .attr("width", x.rangeBand())
      .attr("y", function(d) { return y(d.fatness); })
      .attr("height", function(d) { return height - y(d.fatness); });

svg.selectAll(".text")
      .data(data)
      .enter()
      .append("text")
      .text(function(d) {
                return d.fatness;
        })
      .attr("x", function(d,i) {

        return i*(width/data.length)+20;
        })
      .attr("y", function(d) {
        return height-(d.fatness*10);
        })
        .attr("font-family", "sans-serif")
        .attr("font-size", "11px")
        .attr("fill", "black"); 

d3.select("input").on("change", change);

  var sortTimeout = setTimeout(function() {
    d3.select("input").property("checked", true).each(change);
  }, 2000);

  function change() {
    clearTimeout(sortTimeout);

    // Copy-on-write since tweens are evaluated after a delay.
    var x0 = x.domain(data.sort(this.checked
        ? function(a, b) { return b.fatness - a.fatness; }
        : function(a, b) { return d3.ascending(a.age, b.age); })
        .map(function(d) { return d.age; }))
        .copy();

    var transition = svg.transition().duration(750),
        delay = function(d, i) { return i * 50; };

    transition.selectAll(".bar")
        .delay(delay)
        .attr("x", function(d) { return x0(d.age); });

    transition.selectAll(".text")
        .delay(delay)
        .attr("x", function(d) { 
        console.log(d.fatness);
        return x0(d.age); })
        .attr("y", function(d) { return height-(d.fatness*10);
        });
        /*.text(function(d) {
                return d.fatness;
        })
        .attr("x", function(d,i) {
              return i*(width/data.length)+20;
        })
        .attr("y", function(d) {
        return height-(d.fatness*10);
        })
        .attr("font-family", "sans-serif")
        .attr("font-size", "11px")
        .attr("fill", "white"); 
        */
    transition.select(".x.axis")
        .call(xAxis)
        .selectAll("g")
        .delay(delay);  
  }
   });

function type(d) {
  d.fatness = +d.fatness;
  return d;
}

</script>
<body>

Answer 1

一行：

  .attr("class", "text")

代码的这一部分缺少

   svg.selectAll(".text")
      .data(data)
      .enter()
      .append("text")
      .attr("class", "text")  // <<---- line that is missing
      .text(function(d) {
                return d.fatness;
        })

标签未按可排序的条形图d3.js排序

1 个答案: