This is an example of the filled range chart being used to create a "Fan" chart. Fan charts are used, for example, to illustrate growing uncertainty of future values.
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.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 ()
{
/**
* Starting with the February 2013 release you'll be able to chain Set() calls
*/
var central_line_data = [10,13,15,15,24,19,18,16,17,18,12,11];
var variance1 = [0,0,1,1,2,3,4,4,4,5,5,5];
var variance2 = [0,0,1,1,3,4,5,5,5,6,6,6];
var variance3 = [0,0,1,1,3,4,6,6,6,7,7,7];
var d1 = [];
var d2 = [];
var d3 = [];
var d4 = [];
var d5 = [];
var d6 = [];
for (var i=0; i<central_line_data.length; ++i) {
d1.push(central_line_data[i] + variance1[i]);
d2.push(central_line_data[i] - variance1[i]);
d3.push(central_line_data[i] + variance2[i]);
d4.push(central_line_data[i] - variance2[i]);
d5.push(central_line_data[i] + variance3[i]);
d6.push(central_line_data[i] - variance3[i]);
}
var line1 = new RGraph.Line({
id: 'cvs',
data: [d5, d6],
options: {
noxaxis: true,
textSize: 14,
filled: true,
filledRange: true,
fillstyle: 'rgba(255,0,0,0.1)',
colors: ['rgba(0,0,0,0)'],
linewidth: 0,
ymax: 30,
ylabels: false,
noaxes: true,
backgroundGridAutofitNumvlines: 11,
hmargin: 5,
tickmarks: null,
textAccessible: true
}
}).draw()
var line2 = new RGraph.Line({
id: 'cvs',
data: [d3, d4],
options: {
noxaxis: true,
textSize: 14,
filled: true,
filledRange: true,
fillstyle: 'rgba(255,0,0,0.2)',
colors: ['rgba(0,0,0,0)'],
linewidth: 0,
ymax: 30,
ylabels: false,
noaxes: true,
backgroundGridAutofitNumvlines: 11,
hmargin: 5,
tickmarks: null,
textAccessible: true
}
}).draw()
var line3 = new RGraph.Line({
id: 'cvs',
data: [d1, d2],
options: {
noxaxis: true,
textSize: 14,
filled: true,
filledRange: true,
fillstyle: 'rgba(255,0,0,0.4)',
colors: ['rgba(0,0,0,0)'],
linewidth: 3,
ymax: 30,
ylabels: false,
noaxes: true,
backgroundGrid: false,
hmargin: 5,
tickmarks: null,
textAccessible: true
}
}).draw()
var line4 = new RGraph.Line({
id: 'cvs',
data: central_line_data,
options: {
noxaxis: true,
textSize: 14,
backgroundGrid: false,
labels: ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
tooltips: ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
colors: ['black'],
linewidth: 3,
ymax: 30,
numxticks: 11,
tickmarks: null,
hmargin: 5,
shadow: false,
textAccessible: true
}
}).draw();
};
</script>