A Pie chart using the tooltipsHotspotIgnore option

The Pie chart at the front has the second segment set to be coloured transparent and the tooltipsHotspotIgnore option is set to 1 (so the second segment is ignored).

[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.pie.js"></script>
Put this where you want the chart to show up: 
<div id="canvas-container">
    <canvas id="cvs" width="550" height="450">[No canvas support]</canvas>
</div>
This is the code that generates the chart - it should be placed AFTER the canvas tag(s):