About
RGraph is a JavaScript charts library based on
HTML5 SVG and canvas. RGraph is mature (over 15 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 6.19, 28th September 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.A non-filled Radar chart
Here's a Radar chart
that happens to have two datasets. By default, Radar charts
look a little
different, with a fill color applied. This can be set to transparent though, as is the case
here, giving us this style of appearance.
The labels are set to only be drawn on the north axis, the textSize
has been increased
to 16 and the top label (on the "north" axis) has been set to be blank as it would clash with the
scale labels.
The axes on the chart have also been disabled.
This goes in the documents header:
<script src="RGraph.common.core.js"></script> <script src="RGraph.radar.js"></script>Put this where you want the chart to show up:
<div style="float: right"> <canvas id="cvs" width="500" height="400">[No canvas support]</canvas> </div>This is the code that generates the chart - it should be placed AFTER the
canvas
tag(s):
<script> // Create and configure the Radar chart so that it's not filled and // only has the labels on the north axis. The text size has been // slightly increased. new RGraph.Radar({ id: 'cvs', data: [ [8,7,6,7,8,6], [8,9,4,6,6,8] ], options: { backgroundCirclesPoly: true, backgroundCirclesSpacing: 30, colors: ['transparent'], axesColor: 'transparent', highlights: true, colorsStroke: ['red', 'black'], linewidth: 3, labels: ['', 'Barry', 'Gary','Dave','Paul','Rich'], labelsAxes: 'n', textSize: 16, responsive: [ {maxWidth: null, width: 500, height: 400,parentCss:{'float':'right', textAlign:'center'}}, {maxWidth: 700, width: 300, height: 300,parentCss:{'float':'none', textAlign:'center'}} ] } }).trace(); </script>