Accomplished by using a stacked filled Line chart with the color of the bottom fill being transparent.
This goes in the documents header:<script src="RGraph.svg.common.core.js"></script> <script src="RGraph.svg.line.js"></script>Put this where you want the chart to show up:
<div style="width: 750px; height: 300px" id="chart-container"></div>This is the code that generates the chart:
<script> d1 = [ 1,5,6,4,3,2,7,4, 5,6,3,5,6,4,3,5, 4,2,5,6,2,3,6,4, 4 ]; d2 = []; d1.forEach(function (v, k, arr) { d2[k] = v + RGraph.SVG.random(1,5); }); new RGraph.SVG.Line({ id: 'chart-container', data: [d1, d2], options: { xaxisLabels: [ '00','01','02','03','04','05','06','07', '08','09','10','11','12','13','14','15', '16','17','18','19','20','21','22','23', '00' ], filled: true, filledColors: ['transparent', 'rgba(0,255,0,0.25'], filledAccumulative: true, colors: ['green', 'green'], spline: true, linewidth: 2, backgroundGridVlines: false, backgroundGridBorder: false, xaxis: false, yaxis: false } }).trace(); </script>