An example of a Rose chart with an interactive key

The interactive key has been reimplemented as of June 2013 and added to more chart types.

[No canvas support]

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.dynamic.js"></script>
<script src="RGraph.common.key.js"></script>
<script src="RGraph.drawing.rect.js"></script>
<script src="RGraph.bar.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="450" height="300">
    [No canvas support]
</canvas>
This is the code that generates the chart:
<script>
    new RGraph.Rose({
        id: 'cvs', 
        data: [ [3,2,5], [4,5,3], [5,6,4], [1,8,5], [4,5,3] ],
        options: {
            key: ['Richard','Dave','Charles'],
            keyInteractive: true,
            margin: 5,
            labelsAxes: 'n'
        }
    }).draw();
</script>