This uses the newer addition to canvas from the canvas v5 specification - native dotted and dashed lines. As browsers add support you will be able to use the option in those too but initially it's only supported in Chrome.
obj.Set('background.grid.dashed', true);
obj.Set('background.grid.dotted', true);
This goes in the documents header:
<script src="RGraph.common.core.js"></script> <script src="RGraph.scatter.js"></script>Put this where you want the chart to show up:
<canvas id="cvs" width="600" height="250">[No canvas support]</canvas> <canvas id="cvs" width="600" height="250">[No canvas support]</canvas>This is the code that generates the chart:
<script>
new RGraph.Scatter({
id: 'cvs1',
data: [[50,50]],
options: {
backgroundGridDashed: true,
xmax: 150,
labels: ['Mal', 'Barry', 'Gary', 'Neil', 'Kim', 'Pete', 'Lou', 'Fred', 'Jobe'],
title: 'A dashed background grid',
gutterTop: 35
}
}).draw();
new RGraph.Scatter({
id: 'cvs2',
data: [[50,50]],
options: {
backgroundGridDotted: true,
xmax: 150,
labels: ['Mal', 'Barry', 'Gary', 'Neil', 'Kim', 'Pete', 'Lou', 'Fred', 'Jobe'],
title: 'A dotted background grid',
gutterTop: 35
}
}).draw();
</script>