D3: Stacked Bar Chart (Smartphone OS Marketshare)

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<head>
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  <title>Knight Center D3: Stack Bar Chart</title>
  <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
  <style type="text/css">
  @import url(https://fonts.googleapis.com/css?family=Oswald:700,400);
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  body {
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    color: #333;
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  p {
    font-family: open sans, arial, sans-serif;
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  a:link {
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    text-decoration: none;
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  a:hover {
    text-decoration: underline;
  }
  a:visited {
    color: #3A96B7;
  }
  a:active {
    color: steelBlue;
  }
  .container {
    width: 900px;
    margin-left: auto;
    margin-right: auto;
    margin-top: 50px;
    margin-bottom: 50px;
    padding: 20px 50px;
    background: #fff;
    box-shadow: 0 0 5px #999999;
  }
  .source {
    font-family: oswald, arial, sans-serif;
    font-weight: bold;
    font-size: .75em;
  }
  svg {
  font-size: 10px;
  shape-rendering: crispEdges;
	}
  .axis path,
  .axis line {
    fill: none;
    stroke: #000;
  }
  path.domain {
    stroke: none;
  }
  .y .tick line {
    stroke: #ddd;
  }
  </style>

</head>
<body>
  <div class="container">
    <h1>Worldwide Smartphone OS Market Share, 2012-2015 Q2</h1>
    <p>Quarter 2 smartphone data for 2015 has now been released.  Measuring <a href="https://www.investopedia.com/terms/y/year-over-year.asp">year-over-year</a> performance, the trend of Android phone dominance of the marketplace continues.</p>
    <p><span class="source">Source: <a href="https://www.idc.com/prodserv/smartphone-os-market-share.jsp">ICT, August 2015</a></span></p>
  </div>

// Setup margins using Bostock's method
var margin = {top: 25, right: 160, bottom: 25, left: 30};

var width = 900 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

//  Setup svg
var svg = d3.select(".container")
  .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 + ")");

var data = [
  { year: "2012", android: "69.3", ios: "16.6", windows_phone: "3.1", blackberry_os: "4.9", other: "6.1" },
  { year: "2013", android: "79.8", ios: "12.9", windows_phone: "3.4", blackberry_os: "2.8", other: "1.2" },
  { year: "2014", android: "84.8", ios: "11.6", windows_phone: "2.5", blackberry_os: "0.5", other: "0.7" },
  { year: "2015", android: "82.8", ios: "13.9", windows_phone: "2.6", blackberry_os: "0.3", other: "0.4" },
];

var parse = d3.time.format("%Y").parse;

// Transpose the data into layers by operating system
var dataset = d3.layout.stack()(["android", "ios", "windows_phone", "blackberry_os", "other"].map(function(os) {
  return data.map(function(d) {
    return {x: parse(d.year), y: +d[os]};
  });
}));

// Set x & y scales and colors
var x = d3.scale.ordinal()
  .domain(dataset[0].map(function(d) { return d.x; }))
  .rangeRoundBands([10, width-10], 0.02);

var y = d3.scale.linear()
  .domain([0, 100])
  .range([height, 0]);

var colors = ['#7fc97f','#beaed4','#fdc086','#ffff99','#386cb0'];

// Define and draw axes
var yAxis = d3.svg.axis()
  .scale(y)
  .orient("left")
  .ticks(5)
  .tickSize(-width, 0, 0)
  .tickFormat( function(d) { return d + '%' } );

var xAxis = d3.svg.axis()
  .scale(x)
  .orient("bottom")
  .tickFormat(d3.time.format("%Y"));

svg.append("g")
  .attr("class", "y axis")
  .call(yAxis);

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

// Create groups for each series, rects for each segment
var groups = svg.selectAll("g.percent")
  .data(dataset)
  .enter().append("g")
  .attr("class", "percent")
  .style("fill", function(d, i) { return colors[i]; });

// Create legend
  var legend = svg.selectAll(".legend")
    .data(colors)
    .enter().append("g")
    .attr("class", "legend")
    .attr("transform", function(d, i) { return "translate(30," + i * 19 + ")"; });

legend.append("rect")
    .attr("x", width - 18)
    .attr("width", 18)
    .attr("height", 18)
    .style("fill", function(d, i) {return colors.slice().reverse()[i];});

legend.append("text")
    .attr("x", width + 5)
    .attr("y", 9)
    .attr("dy", ".35em")
    .style("text-anchor", "start")
    .text(function(d, i) {
      switch (i) {
        case 0: return "Other";
        case 1: return "Blackberry OS";
        case 2: return "Windows Phone";
        case 3: return "IOS";
        case 4: return "Android";
      }
    });

// Create tooltip, initial display is hidden
  var tooltip = svg.append("g")
    .attr("class", "tooltip")
    .style("display", "none");

tooltip.append("rect")
    .attr("width", 40)
    .attr("height", 20)
    .attr("fill", "white")
    .style("opacity", 0.5);

tooltip.append("text")
    .attr("x", 20)
    .attr("dy", "1.2em")
    .style("text-anchor", "middle")
    .attr("font-size", "12px")
    .attr("font-weight", "bold");

</script>
</body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js