<html>
  <head>
    <link href="/css/c3.css" rel="stylesheet" type="text/css">
  </head>
  <body>
    <div id="chart"></div>
    <div id="message"></div>

    <script src="http://d3js.org/d3.v4.min.js" charset="utf-8"></script>
    <script src="/js/c3.js"></script>
    <script>

      var chart = c3.generate({
        data: {
          x: 'x',
          columns: [
            ['x', '1e-3', '1e-2', '1'],
            ['data1', 30, 200, 100, 400, 150, 250, 50, 100, 250]
          ]
        },
        axis: {
          x: {
            type: 'categorized'
          }
        }
      });

      setTimeout(function () {
        d3.select('#message').node().innerHTML = "chart.categories() =>" + chart.categories();
      }, 1000);

      setTimeout(function () {
        chart.categories(['updated 1', 'updated 2', 'updated 3', 'updated 4']);
        d3.select('#message').node().innerHTML = "";
      }, 2000);

      setTimeout(function () {
        d3.select('#message').node().innerHTML = "chart.category(1) =>" + chart.category(1);
      }, 3000);

      setTimeout(function () {
        chart.category(1, 'UPDATED 1');
        d3.select('#message').node().innerHTML = "";
      }, 4000);

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