A basic Rose chart

[No canvas support]

Here's a simple Rose chart which can be quite easily used as a traditional Wind Rose chart (ie based on a compass with larger segments indicating stronger winds).

The canvas Rose can be stacked or non-equi-angular and there's also an SVG version of it. The SVG version can also be configured in a stacked + non-equi-angular configuration (the canvas version can't do this). There's a demo of that in the download called svg-rose-non-equi-angular-stacked.html

Though the canvas Rose can be configured to have a 3D appearance. There's a demo of the 3D Rose online and in the download.

The SVG Rose also has a segmentsAngleOffset property. This property allows you to rotate the segments slightly and by using two Rose charts - one with a positive offset and one with a negative offset you can get a grouped effect to the chart. This is shown by a demo in the download called svg-rose-grouped.html

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.rose.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="400" height="400">
    [No canvas support]
</canvas>

This is the code that generates the chart: