tests/labelsDateUTC.html

   1 <!DOCTYPE html>
   2 <html>
   3   <head>
   4     <title>UTC date labels</title>
   5     <!--
   6     For production (minified) code, use:
   7     <script type="text/javascript" src="dygraph-combined.js"></script>
   8     -->
   9     <script type="text/javascript" src="../dygraph-dev.js"></script>
  10   </head>
  11   <body>
  12
  13     <h2>UTC date and time labels</h2>
  14
  15     <p>This shows how date ticks and labels may be generated according to local
  16     time (default) or UTC with the option <code>labelsUTC</code>.</p>
  17
  18     <p>72 hours of random hourly data since 2009-Jul-23 18:00 UTC
  19     according to local time (top) and UTC (bottom):</p>
  20
  21     <div id="div_loc" style="width:600px; height:200px;"></div>
  22     <div id="div_utc" style="width:600px; height:200px;"></div>
  23
  24     <p>Please note the offset between the respective ticks in both plots.
  25     It should match your local time zone offset.</p>
  26
  27     <p>You can also check it by hovering over corresponding points and comparing
  28     the value labels.</p>
  29
  30     <p>Try different zoom levels to show that ticks are always placed at nice
  31     time boundaries.</p>
  32
  33     <script type="text/javascript">
  34       var data = (function() {
  35         var rand10 = function () { return Math.round(10 * Math.random()); };
  36         var a = []
  37         for (var y = 2009, m = 6, d = 23, hh = 18, n=0; n < 72; n++) {
  38           a.push([new Date(Date.UTC(y, m, d, hh + n, 0, 0)), rand10()]);
  39         }
  40         return a;
  41       })();
  42       gloc = new Dygraph(
  43                    document.getElementById("div_loc"),
  44                    data,
  45                    {
  46                      labels: ['local time', 'random']
  47                    }
  48                  );
  49       gutc = new Dygraph(
  50                    document.getElementById("div_utc"),
  51                    data,
  52                    {
  53                      labelsUTC: true,
  54                      labels: ['UTC', 'random']
  55                    }
  56                  );
  57     </script>
  58
  59   </body>
  60 </html>