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<title>Bar charts</title>
<meta name="keywords" content="rgraph html5 canvas example bar charts" />
<meta name="description" content="Bar charts example" />
<meta property="og:title" content="RGraph: HTML5 Javascript charts library" />
<meta property="og:description" content="A javascript charts library based on the HTML5 canvas tag" />
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<script src="../libraries/RGraph.common.core.js" ></script>
<script src="../libraries/RGraph.common.effects.js" ></script>
<script src="../libraries/RGraph.common.tooltips.js" ></script>
<script src="../libraries/RGraph.common.key.js" ></script>
<script src="../libraries/RGraph.bar.js" ></script>
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<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" ></script>
<script>
/**
* The onload function creates the graph
*/
window.onload = function ()
{
var bar1 = new RGraph.Bar('bar1', [
[0.000092, 0.00008],
[0.000034, 0.000057],
[0.000056, 0.000062],
[0.000055, 0.000045],
[0.000036, 0.000012],
[0.000044, 0.000056],
[0.000051, 0.000066],
[0.000068, 0.000088]]);
bar1.Set('chart.background.barcolor1', 'white');
bar1.Set('chart.background.barcolor2', 'white');
bar1.Set('chart.labels', ['1st', '2nd', '3rd', '4th', '5th', '6th', '7th', '8th']);
bar1.Set('chart.key', ['John', 'Bob']);
bar1.Set('chart.key.position.y', 35);
bar1.Set('chart.key.position', 'gutter');
bar1.Set('chart.key.background', 'rgb(255,255,255)');
bar1.Set('chart.colors', ['#77f', '#7f7']);
bar1.Set('chart.shadow', true);
bar1.Set('chart.shadow.blur', 15);
bar1.Set('chart.shadow.offsetx', 0);
bar1.Set('chart.shadow.offsety', 0);
bar1.Set('chart.shadow.color', '#aaa');
bar1.Set('chart.yaxispos', 'right');
bar1.Set('chart.strokestyle', 'rgba(0,0,0,0)');
bar1.Set('chart.gutter.left', 5);
bar1.Set('chart.gutter.right', 55);
bar1.Draw();
var bar2 = new RGraph.Bar('bar2', [[30,20,19,21], [23,25, 27, 30], [30,25,29, 32], [27,28,35,33], [26,18,29,30], [31,20,25,27], [39,28,28,35], [27,29,28,29], [26,23,26,27], [30,20,19,21], [30,20,19,21], [30,20,19,21]]);
bar2.Set('chart.units.pre', '$');
bar2.Set('chart.title', 'Sales in the last 8 months (tooltips)');
bar2.Set('chart.title.vpos', 0.5);
bar2.Set('chart.colors', ['red', 'yellow', 'green', 'orange']);
bar2.Set('chart.gutter.left', 40);
bar2.Set('chart.gutter.right', 15);
bar2.Set('chart.gutter.top', 40);
bar2.Set('chart.gutter.bottom', 50);
bar2.Set('chart.shadow', true);
bar2.Set('chart.shadow.color', '#aaa');
bar2.Set('chart.background.barcolor1', 'white');
bar2.Set('chart.background.barcolor2', 'white');
bar2.Set('chart.background.grid.hsize', 5);
bar2.Set('chart.background.grid.vsize', 5);
bar2.Set('chart.grouping', 'stacked');
bar2.Set('chart.labels', ['January', '\r\nFebruary', 'March', '\r\nApril', 'May', '\r\nJune', 'July', '\r\nAugust', 'September','\r\nOctober','November','\r\nDecember']);
bar2.Set('chart.labels.above', true);
bar2.Set('chart.key', ['Richard', 'Barbara', 'Johnny', 'Frederick']);
bar2.Set('chart.key.background', 'rgba(255,255,255,0.7)');
bar2.Set('chart.key.position', 'gutter');
bar2.Set('chart.key.position.gutter.boxed', false);
bar2.Set('chart.key.position.y', bar2.Get('chart.gutter.top') - 15);
bar2.Set('chart.key.border', false);
bar2.Set('chart.background.grid.width', 0.3); // Decimals are permitted
bar2.Set('chart.strokestyle', 'rgba(0,0,0,0)');
bar2.Set('chart.tooltips.event', 'onmousemove');
if (!RGraph.isOld()) {
tooltipFunc = function (i)
{
var r = i % 4;
if (r == 3) return 'John'
else if (r == 2) return 'Rich';
else if (r == 1) return 'Jane';
else if (r == 0) return 'Quentin';
}
bar2.Set('chart.tooltips', tooltipFunc);
}
bar2.Draw();
var bar3 = new RGraph.Bar('bar3', [4,3,2,6,5,14]);
bar3.Set('chart.labels', ['Lou','Pete','Bertie','Barry','Bob','Fred']);
if (!RGraph.isIE8()) {
bar3.Set('chart.tooltips', function (idx){ return '<b>' + bar3.Get('chart.labels')[idx] + '</b>';});
}
bar3.Set('chart.colors', ['red','yellow','blue','pink','cyan','#ddd']);
bar3.Set('chart.colors.sequential', true);
bar3.Draw();
var bar4 = new RGraph.Bar('bar4', [-58,-48,-34,-26,-18,5,15,29,37,45,51]);
bar4.Set('chart.labels', ['Lou','Pete','Bertie','Barry','Bob','Fred','Louise']);
bar4.Set('chart.colors', ['red']);
bar4.Set('chart.yaxispos', 'right');
bar4.Set('chart.xaxispos', 'center');
if (!RGraph.isIE8()) {
RGraph.Effects.Fade.In(bar4);
RGraph.Effects.jQuery.Reveal(bar4);
} else {
bar4.Draw();
}
}
</script>
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<body>
<!-- Social networking buttons -->
<?php
$prefix = substr($_SERVER['SERVER_NAME'], 0, 3);
require("/rgraph.{$prefix}/social.html");
?>
<!-- Social networking buttons -->
<div id="breadcrumb">
<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
>
<a href="./index.html">Examples</a>
>
Bar charts
</div>
<h1>Bar <span>charts</span></h1>
<script>
if (RGraph.isOld()) {
document.write('<div style="background-color: #fee; border: 2px dashed red; padding: 5px"><b>Important</b><br /><br /> Internet Explorer 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>');
}
</script>
<div>
<div>
<p>
The bar chart is probably one of the most widely used of charts, and also one of the most versatile.
It's defined as a chart with rectangular bars with lengths proportional to the values they represent.
The bar chart can be used to represent two or more values. With grouped and stacked bar charts, you
can visualise two or more sets of data. For example two years worth of sales figures. Doing this you
will be able to easily see trends, for example a better year when it comes to sales. You can
also show negative values by having the X axis in the center, like the examples shown. If you use
a grouped or stacked bar chart, a key may be helpful to your users.
</p>
<p>
By using the tooltips feature, you can provide more detail about what a particular bar represents. The
tooltips in RGraph can contain wide range of HTML, so you can use them to show photos or movies for example.
</p>
<ul>
<li><a href="../docs/bar.html">Bar chart API documentation</a></li>
</ul>
</div>
<div>
<canvas id="bar1" width="450" height="200">[No canvas support]</canvas>
<canvas id="bar2" width="450" height="200">[No canvas support]</canvas>
</div>
<div>
<canvas id="bar3" width="450" height="200">[No canvas support]</canvas>
<canvas id="bar4" width="450" height="200">[No canvas support]</canvas>
</div>
</div>
</body>
</html>