A Scatter chart that's configured as a Bubble chart

[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.tooltips.js"></script>
<script src="RGraph.scatter.js"></script>
Put this where you want the chart to show up: 
<canvas id="cvs" width="600" height="200">
    [No canvas support]
</canvas><br />
<button onclick="var scatter = RGraph.ObjectRegistry.getFirstObjectByType('scatter'); scatter.set('colorsBubbleGraduated', !scatter.get('colorsBubbleGraduated') ); RGraph.redraw();">Toggle gradients</button>
This is the code that generates the chart: