D3 Examples - D3 With <svg>

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<!DOCTYPE html>
<html>
<head>
    <title> D3 Test </title>
    <script type="text/javascript" src="https://d3js.org/d3.v3.min.js"></script>
</head>
<body>
    <h1>SVG's Barchart</h1>
    <p>I'm hosted with GitHub Pages.</p>
​
    <script type="text/javascript">
        //Width and height
        var w = 944;
        var h = 400;
        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 yScale = h / d3.max(dataset)
​
        //Create SVG element
        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);  //Bar width of 20 plus 1 for padding
            })
            .attr("y", function(d) {
                return h - (d*yScale);  //Height minus data value
            })
            .attr("width", w / dataset.length - barPadding)
            .attr("height", function(d) {
                return d*yScale;
            })
            .attr("fill", function(d) {
                return "rgb(0, 0, " + (d * 10) + ")";
            });
    
    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 * yScale) + 15;
        })
        .attr("font-family", "sans-serif")
        .attr("font-size", "11px")
        .attr("fill", "white")
        .attr("text-anchor", "middle");
    </script>
</body>
</html>
    