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<title>RGraph: HTML5 Javascript charts library - bar charts</title>
<meta name="keywords" content="rgraph html5 canvas example bar charts" />
<meta name="description" content="RGraph: HTML5 Javascript charts library - Bar charts example" />
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<meta property="og:description" content="A javascript charts library based on the HTML5 canvas tag" />
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<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', 5);
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', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September','October','November','December']);
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.text.angle', 35);
bar2.Set('chart.strokestyle', 'rgba(0,0,0,0)');
bar2.Set('chart.tooltips.event', 'onmousemove');
if (!RGraph.isIE8()) {
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);
}
if (!RGraph.isIE8()) {
RGraph.Effects.Bar.Grow(bar2);
} else {
bar2.Draw();
}
}
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<div id="breadcrumb">
<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
>
<a href="./index.html">Examples</a>
>
Bar charts
</div>
<h1>RGraph: <span>HTML5 Javascript charts library</span> - Bar 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>');
}
</script>
<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 differences, 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
<b>RGraph</b> can contain wide range of HTML, so you can use them to show photos or movies for example.
</p>
<div>
<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>
</body>
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|
