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.
Download
Get the latest version of RGraph (version 6.20, 1st December 2024) 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>