D3 Examples - Bar Chart

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>
​
<body>
  <script>
    var w = 500;
    var h = 100;
    var barPadding = 1;
    
    var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13,
                11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ];
    
    var svg = d3.select("body").append("svg").attr("width", w).attr("height", h);
​
    svg.selectAll("rect")
        .data(dataset)
        .enter()
        .append("rect")
        .attr("x", function(d, i){
        return i * (w / dataset.length);
        })
        .attr("y", function(d) {
        return h - (d * 4);
        })
        .attr("width", w / dataset.length - barPadding)
        .attr("height", function(d) {
        return d * 4;
        })
        .attr("fill", function(d) {
        return "rgb(0, 0, " + (d * 15) + ")";
        });
    
    svg.selectAll("text")
        .data(dataset)
        .enter()
        .append("text")
        .text(function(d) {
        return d;
        })
        .attr("x", function(d, i) {
        return i * (w / dataset.length) + (w / dataset.length - barPadding) / 2;
        })
        .attr("y", function(d) {
        return h - (d * 4) + 14;
        })
        .attr("font-family", "sans-serif")
        .attr("font-size", "11px")
        .attr("fill", "white")
        .attr("text-anchor", "middle");
  </script>
</body>
​
    