This is achieved by using a stacked Bar chart and setting the first color to be transparent.
<script src="RGraph.common.core.js"></script> <script src="RGraph.bar.js"></script>Put this where you want the chart to show up:
<div style="padding: 15px">
<canvas id="cvs" width="750" height="250">[No canvas support]</canvas>
</div>
This is the code that generates the chart:
<script>
new RGraph.Bar({
id: 'cvs',
data: [[3,4,8],[5,2,2],[4,3,5],[6,3,5],[8,4,8],[1,1,5],[4,6,5]],
options: {
labels: ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday'],
unitsPost: 'k',
grouping: 'stacked',
shadow: false,
colors: ['transparent', 'red','green'],
colorsReverse: true,
strokestyle: 'rgba(0,0,0,0)',
textSize: 14,
textAccessible: true,
title: 'A stacked range Bar chart',
numyticks: 5,
gutterLeft: 50,
scaleZerostart: true,
key: ['Dave','Luis'],
keyPosition: 'gutter',
keyColors: ['red','green'],
hmargin: 15
}
}).draw();
</script>