jqPlotでつくった折れ線グラグのX軸を日付にする方法 ref: http://qiita.com/ponsuke0531/items/7610557b0042c45fb924

html

<!-- 省略:変更なし -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/plugins/jqplot.canvasTextRenderer.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/plugins/jqplot.canvasAxisTickRenderer.min.js"></script>
    <script type="text/javascript" src="js/myJqPlot.js"></script>
<!-- 省略:変更なし -->

myJqPlot.js

<!-- 省略:変更なし -->
var firstXaxis = {
  renderer:$.jqplot.DateAxisRenderer,
  rendererOptions: {
    tickRenderer: $.jqplot.CanvasAxisTickRenderer
  },
  tickOptions: {
    formatString: '%F',
    angle: -45
  }
};
<!-- 省略:変更なし -->