tests/value-axis-formatters.html

   1 <!DOCTYPE html>
   2 <html>
   3   <head>
   4     <title>valueFormatter and axisLabelFormatter</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="../dist/dygraph.js"></script>
  10
  11   </head>
  12   <body style="max-width: 800px;">
  13     <h2>Multiple y-axes</h2>
  14     <p>This demonstrates how the valueFormatter and axisLabelFormatter options work. The valueFormatter controls the display of the legend. The axisLabelFormatter controls the display of axis tick marks. These can be set on a per-axis basis.</p>
  15     <div id="demodiv"></div>
  16
  17     <ul>
  18       <li>xvf = x-axis valueFormatter
  19       <li>yvf = y-axis valueFormatter
  20       <li>y2vf = secondary y-axis valueFormatter
  21       <li>xalf = x-axis axisLabelFormatter
  22       <li>yalf = y-axis axisLabelFormatter
  23       <li>y2alf = secondary y-axis axisLabelFormatter
  24     </ul>
  25
  26     <script type="text/javascript">
  27       var data = [];
  28       for (var i = 1; i <= 100; i++) {
  29         var m = "01", d = i;
  30         if (d > 31) { m = "02"; d -= 31; }
  31         if (m == "02" && d > 28) { m = "03"; d -= 28; }
  32         if (m == "03" && d > 31) { m = "04"; d -= 31; }
  33         if (d < 10) d = "0" + d;
  34         // two series, one with range 1-100, one with range 1-2M
  35         data.push([new Date("2010/" + m + "/" + d),
  36                    i,
  37                    100 - i,
  38                    1e6 * (1 + i * (100 - i) / (50 * 50)),
  39                    1e6 * (2 - i * (100 - i) / (50 * 50))]);
  40       }
  41
  42       function formatDate(d) {
  43         var yyyy = d.getFullYear(),
  44             mm = d.getMonth() + 1,
  45             dd = d.getDate();
  46         return yyyy + '-' + (mm < 10 ? '0' : '') + mm + (dd < 10 ? '0' : '') + dd;
  47       }
  48
  49       g = new Dygraph(
  50           document.getElementById("demodiv"),
  51           data,
  52           {
  53             labels: [ 'Date', 'Y1', 'Y2', 'Y3', 'Y4' ],
  54             width: 640,
  55             height: 350,
  56             series: {
  57               'Y3': { axis: 'y2' },
  58               'Y4': { axis: 'y2' }
  59             },
  60             axes: {
  61               x: {
  62                 valueFormatter: function(ms) {
  63                   return 'xvf(' + formatDate(new Date(ms)) + ')';
  64                 },
  65                 axisLabelFormatter: function(d) {
  66                   return 'xalf(' + formatDate(d) + ')';
  67                 },
  68                 pixelsPerLabel: 100,
  69                 axisLabelWidth: 100,
  70               },
  71               y: {
  72                 valueFormatter: function(y) {
  73                   return 'yvf(' + y.toPrecision(2) + ')';
  74                 },
  75                 axisLabelFormatter: function(y) {
  76                   return 'yalf(' + y.toPrecision(2) + ')';
  77                 },
  78                 axisLabelWidth: 100
  79               },
  80               y2: {
  81                 valueFormatter: function(y2) {
  82                   return 'y2vf(' + y2.toPrecision(2) + ')';
  83                 },
  84                 axisLabelFormatter: function(y2) {
  85                   return 'y2alf(' + y2.toPrecision(2) + ')';
  86                 }
  87               }
  88             }
  89           }
  90       );
  91     </script>
  92 </body>
  93 </html>