A basic Gauge chart

This goes in the documents header:

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

Put this where you want the chart to show up:

<canvas id="cvs" width="250" height="250">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    new RGraph.Gauge({
        id: 'cvs',
        min: 0,
        max: 10,
        value: 3.29,
        options: {
            valueText: true,
            valueTextDecimals: 2,
            valueTextBounding: false,
            valueTextYPos: 0.4,
            textSize: 18,
            
            greenColor: '#afa',
            greenWidth: 15,
            redWidth: 15,
            yellowWidth: 15,
            
            labelsOffsetRadius: 9,
            labelsOffsetx: 0,
            labelsOffsety: 0
        }
    }).draw();
</script>