C3.js spline chart

Spline chart with the C3.js adapter

HTML

<script src="https://d26b395fwzu5fz.cloudfront.net/3.4.0/keen.min.js?date=2016-02-17"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/c3/0.4.10/c3.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/c3/0.4.10/c3.min.js"></script>
<div id="chart"></div>

JavaScript

var client = new Keen({
    projectId: "53eab6e12481962467000000",
    readKey: "d1b97982ce67ad4b411af30e53dd75be6cf610213c35f3bd3dd2ef62eaeac14632164890413e2cc2df2e489da88e87430af43628b0c9e0b2870d0a70580d5f5fe8d9ba2a6d56f9448a3b6f62a5e6cdd1be435c227253fbe3fab27beb0d14f91b710d9a6e657ecf47775281abc17ec455"
});

Keen.ready(function(){
    var el = document.getElementById("chart");
    var query = new Keen.Query("count", {
        eventCollection: "user_action",
        timeframe: {
  				start: "2013-12-01",
  				end: "2015-02-01"
				},
        interval: "every_21_days"
    });
    client.draw(query, el, {
        library: "c3",
        height: 400,
        chartType: "spline",
        chartOptions: {
            axis: {
                x: {
                    type: 'timeseries',
                    tick: {
                        count: 6,
                        format: '%Y-%m-%d'
                    }
                },
                y: {
                    label: 'Actions per day'
                }
            },
            point: {
                show: true
            }
        }
    });
});