An example of a Scatter 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.scatter.js"></script>
Put this where you want the chart to show up:
<canvas id="cvs" width="450" height="350">
    [No canvas support]
</canvas>
This is the code that generates the chart:
<script>
    data1 = [ [45,51,'green'], [45,46,'green'], [45,35,'green'] ];
    data2 = [ [225,32,'red'],  [225,25,'red'],  [225,12,'red']  ];
    data3 = [ [315,13,'pink'], [315,26,'pink'], [315,36,'pink'] ];

    new RGraph.Scatter({
        id: 'cvs',
        data: [data1, data2, data3],
        options: {
            xaxisScaleMax: 360,
            xaxisLabels: ['Q1','Q2','Q3','Q4'],
            key: ['Richard','Dave','Charles'],
            keyPosition: 'margin',
            keyInteractive: true,
            keyColors: ['green','red','pink']
        }
    }).draw();
</script>