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.hbar.js"></script>Put this where you want the chart to show up:
<canvas id="cvs1" width="600" height="250">[No canvas support]</canvas> <canvas id="cvs2" width="600" height="250">[No canvas support]</canvas>This is the code that generates the chart:
<script>
window.onload = function ()
{
var hbar = new RGraph.HBar({
id: 'cvs1',
data: [4,5,3,8,4,9,6,5,3],
options: {
labels: ['Mal', 'Barry', 'Gary', 'Neil', 'Kim', 'Pete', 'Lou', 'Fred', 'Jobe'],
title: 'A dashed background grid',
backgroundGridDashed: true,
backgroundGridAutofitNumhlines: 9,
gutterTop: 35
}
}).draw()
var hbar2 = new RGraph.HBar({
id: 'cvs2',
data: [4,5,3,8,4,9,6,5,3],
options: {
labels: ['Mal', 'Barry', 'Gary', 'Neil', 'Kim', 'Pete', 'Lou', 'Fred', 'Jobe'],
title: 'A dotted background grid',
backgroundGridDotted: true,
backgroundGridAutofitNumhlines: 9,
gutterTop: 35
}
}).draw();
};
</script>