About
RGraph is a JavaScript charts library based on
HTML5 SVG and canvas. RGraph is mature (over 17 years
old) and has a wealth of features making it an ideal
choice to use for showing charts on your website.
New HTML datagrid
In the April 2025 release a new datagrid object
was added.
This makes it easy to add static or dynamic data
tables to your pages. It can be used whether you use the
canvas or SVG libraries or entirely standalone.
Download
Get the latest version of RGraph (version 6.22, 24th June 2025) from
the download page. You can read the changelog here. There's also older versions available,
minified files and links to cdnjs.com hosted libraries.
License
RGraph can be used for free under the GPL or if
that doesn't suit your situation there's an
inexpensive (£129) commercial license available.An adjustable Bar chart
Here's a basic Bar chart that only has one configuration option specified: adjustable This means that the chart can be adjusted dynamically by clicking on the chart and moving your mouse up and down. The types of charts that can be adjusted are:
- Bar charts
- Fuel charts
- Gantt charts
- Gauge charts
- Horizontal Bar charts
- Horizontal Progress bars
- Line charts (including spline charts)
- Meter charts
- Odometer charts
- Semi-circular Progress bars
- Thermometer charts
- Vertical Progress bars
- SVG Gauge chart
You can read more about adjusting and see the canvas documentation for it here.
When the browser/screen is smaller the size of the canvas is reduced, the textSize is reduced and the css float on the container is removed.
This goes in the documents header:
<script src="RGraph.common.core.js"></script> <script src="RGraph.common.dynamic.js"></script> <script src="RGraph.bar.js"></script>Put this where you want the chart to show up:
<div style="float: right"> <canvas id="cvs" width="600" height="250">[No canvas support]</canvas> </div>This is the code that generates the chart - it should be placed AFTER the canvas tag(s):
<script> // Quite a basic Bar chart which just has the single 'adjustable' // property being stipulated meaning that you dynamically adjust // the chart new RGraph.Bar({ id: 'cvs', data: [8,6,4,8,9,5,3,2,5], options: { title: 'An adjustable Bar chart', titleBold: true, titleSize: 16, adjustable: true, xaxisLabels: ['Alf','Vinny','Moe','Bill','Neil','Olga','Lilly','Paul','John'], responsive: [ {maxWidth: null,width: 600,height: 250,options:{textSize:16},parentCss: {'float':'right'}}, {maxWidth: 800,width: 350,height: 200,options:{textSize:10},parentCss: {'float':'none', textAlign: 'center'}} ] } }).wave(); </script>