A 'stacked' range Line chart

This is an example of how you can manipulate the data that you give to a range chart so that you get a stacking effect. There are actually three line charts here - one on top of the other.

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.common.effects.js"></script>
<script src="RGraph.drawing.poly.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 data = [[3,5,6,7,4,8,5,9,13,14,16,15,17,18,19,21,24,25,25,26,28,28,27,26,25,25]];
        
        for (var j=1; j<6; j+=2) {
            data[j]   = [];
            data[j+1] = [];
            for (var i=0,len=data[0].length; i<len; i+=1) {
                data[j][i] = data[0][i] + (2 * j);
                data[j+1][i] = data[0][i] + (2 * j);
            }
        }

        var line = new RGraph.Line({
            id: 'cvs',
            data: [data[0], data[1]],
            options: {
                fillstyle: 'red',
                filled: true,
                filledRange: true,
                colors: ['rgba(0,0,0,0)'],
                linewidth: 1,
                ymax: 50,
                numxticks: 25,
                gutterBottom: 50,
                tickmarks: null,
                textAccessible: true
            }
        }).draw()

        var line = new RGraph.Line({
            id: 'cvs',
            data: [data[2], data[3]],
            options: {
                fillstyle: '#0c0',
                filled: true,
                filledRange: true,
                colors: ['rgba(0,0,0,0)'],
                linewidth: 1,
                ymax: 50,
                numxticks: 25,
                backgroundGrid: false,
                gutterBottom: 50,
                tickmarks: null,
                textAccessible: true
            }
        }).draw()

        var line = new RGraph.Line({
            id: 'cvs',
            data: [data[4], data[5]],
            options: {
                fillstyle: '#66f',
                filled: true,
                filledRange: true,
                colors: ['rgba(0,0,0,0)'],
                linewidth: 1,
                ymax: 50,
                numxticks: 25,
                backgroundGrid: false,
                gutterBottom: 50,
                tickmarks: null,
                textAccessible: true
            }
        }).draw()


        var line = new RGraph.Line({
            id: 'cvs',
            data: [4,7,8,5,4,6,8,9,12,18,19,17,19,21,22,25,24,26,27,29,28,27,29,33,35,37],
            options: {
            labels: ['12th','\r\n13th','14th','\r\n15th','16th','\r\n17th','18th','\r\n19th','20th','\r\n21st','22nd','\r\n23rd','24th','\r\n25th','26th','\r\n27th','28th','\r\n29th','30th','\r\n31st','1st','\r\n2nd','3rd','\r\n4th','5th','\r\n6th'],
                colors: ['black'],
                linewidth: 3,
                ymax: 50,
                numxticks: 0,
                backgroundGrid: false,
                gutterBottom: 50,
                tickmarks: null,
                textAccessible: true
            }
        }).draw();
    };
</script>