概要

chart.js で Qiita:Team / esa / DocBase を比較するレーダーチャートを作成（凡例付）します。

注意事項

グラフの内容は適当です。あくまで三者比較をするお題が欲しかっただけです。

実際の Qiita:Team, esa, DocBase の機能については後述のリンクを参照ください。

サンプル

<!doctype html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <title>Qiita:Team / esa / DocBase の比較</title>
  <style>
    #legend {
        padding: 10px;
        overflow: hidden;
        position: relative;
    }
    ul.pie-legend {
        list-style: none outside none;
        float: left;
        margin: 0 0 0 0;
        padding: 0;
        position: relative;
        left: 50%;
    }
    ul.pie-legend > li {
        float: left;
        margin-right: 5px;
        padding: 5px;
        position: relative;
        left: -50%;
    }
  </style>
  <script src="Chart.min.js"></script>
  <script language="JavaScript"><!--
  function displayPieChart() {
    var data = {
        labels: ["デザイン", "フィードバック", "フロー", "ストック", "大規模利用", "コスト"],
        datasets: [
            {
                label: "Qiita:Team",
                fillColor: "rgba(200,0,0,0.2)",
                strokeColor: "green",
                pointColor: "green",
                pointStrokeColor: "green",
                pointHighlightFill: "green",
                pointHighlightStroke: "green",
                data: [4, 3, 5, 2, 4, 3]
            },
            {
                label: "esa",
                fillColor: "rgba(200,0,0,0.2)",
                strokeColor: "red",
                pointColor: "red",
                pointStrokeColor: "red",
                pointHighlightFill: "red",
                pointHighlightStroke: "red",
                data: [5, 5, 2, 5, 3, 3]
            },
            {
                label: "DocBase",
                fillColor: "rgba(200,0,0,0.2)",
                strokeColor: "yellow",
                pointColor: "yellow",
                pointStrokeColor: "yellow",
                pointHighlightFill: "yellow",
                pointHighlightStroke: "yellow",
                data: [3, 4, 2, 5, 5, 3]
            }
        ]
    };
    var ctx = document.getElementById("radarChart").getContext("2d");
    var options = { 
      legendTemplate : "<% for (var i=0; i<datasets.length; i++){%><span style=\"background-color:<%=datasets[i].strokeColor%>\">&nbsp;&nbsp;&nbsp;</span>&nbsp;<%if(datasets[i].label){%><%=datasets[i].label%><%}%><br><%}%>"
    };
    var radarChart = new Chart(ctx).Radar(data, options);
    document.getElementById("legend").innerHTML = radarChart.generateLegend();
  }
  --></script>
</head>
<body onload="displayPieChart();">
  <div class="box">
    <canvas id="radarChart" height="450" width="450"></canvas>
    <div id="legend"></div>
  </div>
</body>
</html>