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<title>RGraph: HTML5 Javascript charts library - Gauge charts</title>
<meta name="keywords" content="rgraph html5 canvas example gauge charts" />
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<meta property="og:description" content="A charts library based on the HTML5 canvas tag" />
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<script src="../libraries/RGraph.gauge.js" ></script>
<!--[if IE 8]><script src="../excanvas/excanvas.original.js"></script><![endif]-->
<script>
window.onload = function ()
{
var gauge1 = new RGraph.Gauge('gauge1', 0, 100, 16);
gauge1.Set('chart.title', 'CPU');
gauge1.Draw();
var gauge2 = new RGraph.Gauge('gauge2', 20, 40, 37);
gauge2.Set('chart.title', 'Bandwidth');
gauge2.Set('chart.units.post', 'M');
RGraph.Effects.Gauge.Grow(gauge2);
function ChangeGauge ()
{
gauge1.value = RGraph.random(0,100);
RGraph.Effects.Gauge.Grow(gauge1);
}
setInterval(ChangeGauge, 5000)
var gauge3 = new RGraph.Gauge('gauge3', 0, 100, 84);
gauge3.Set('chart.title', 'Memory Usage');
gauge3.Set('chart.units.post', '%');
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<h1>RGraph: <span>HTML5 Javascript charts library</span> - Gauge charts</h1>
<script>
if (RGraph.isIE8()) {
document.write('<div style="background-color: #fee; border: 2px dashed red; padding: 5px"><b>Important</b><br /><br /> Internet Explorer 8 does not natively support the HTML5 canvas tag, so if you want to see the charts, you can either:<ul><li>Install <a href="http://code.google.com/chrome/chromeframe/">Google Chrome Frame</a></li><li>Use ExCanvas. This is provided in the RGraph Archive.</li><li>Use another browser entirely. Your choices are Firefox 3.5+, Chrome 2+, Safari 4+ or Opera 10.5+. </li></ul> <b>Note:</b> Internet Explorer 9 fully supports the canvas tag.</div>');
}
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<div id="breadcrumb">
<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
>
<a href="./index.html">Examples</a>
>
Gauge
</div>
<div>
<p>
Gauges are another meter variant that may be more suited to your websites design. The Gauges below show how you
could hook them up to some AJAX to get constantly updated gauges. The Gauges below are simply on a timer along
with some random numbers.
</p>
<p></p>
</div>
<div>
<ul>
<li><a href="../docs/gauge.html">Gauge charts API documentation</a></li>
</ul>
</div>
<div style="text-align: center">
<canvas id="gauge1" width="250" height="250"><div class="canvasfallback">[No canvas support]</div></canvas>
<canvas id="gauge2" width="250" height="250"><div class="canvasfallback">[No canvas support]</div></canvas>
<canvas id="gauge3" width="250" height="250">[No canvas support]</canvas>
</script>
</div>
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