A basic example of the drawing API marker2 object

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.drawing.marker2.js"></script>
<script src="RGraph.line.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="600" height="250">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var line = new RGraph.Line({
            id: 'cvs',
            data: [5,8,6,4,3,5,2],
            options: {
                hmargin: 5,
                labels: ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']
            }
        }).draw()   
        
        var coords = line.coords[2];
        
        var marker2 = new RGraph.Drawing.Marker2({
            id: 'cvs',
            x: line.coords[4][0],
            y: line.coords[4][1],
            text: 'Friday dip in activity',
            options: {
                tooltips: ['Lou'],
                align: 'left',
                textAccessiblePointerevents: false
            }
        }).draw();
    };
</script>