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.net Powerful JavaScript charts
About
RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 16 years old) and has a wealth of features making it an ideal choice to use for showing charts on your website.

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Download
Get the latest version of RGraph (version 6.20, 1st December 2024) from the download page. You can read the changelog here. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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License
RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£129) commercial license available.

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A floating Line chart

This is a demo of a Line chart that was inspired by an example that was showcased on the NVD website.

It's a filled Line chart that has the filledAccumulative and the spline options enabled.

And importantly, the first color for the chart is transparent - making it seem like the rest of the datasets are "floating".

The rest of the configuration is quite straightforward - the vertical grid lines are turned off and the colors are a custom set. There are also labels specified (the labels are numbers - though this does NOT make it a scale. The Line chart x-axis is NOT scaled).

The responsive configuration reduces the size of the svg tag and removes the css float.

Note: There's a canvas version of this chart in the download (called demos/line-nvd.html) where the datasets are traced sequentially (so the datasets are traced one at a time and when one dataset finishes tracing the next starts).

This goes in the documents header:
<script src="../libraries/RGraph.svg.common.core.js" ></script>
<script src="../libraries/RGraph.svg.line.js" ></script>
Put this where you want the chart to show up:
<div style="float: right">
    <div style="width: 600px; height: 250px" id="chart-container"></div>
</div>
This is the code that generates the chart - it should be placed AFTER the div tag:
<script>
    // Create the Line chart and give it all of the data that's to be shown
    // on the chart. There's four datasets but so that the lines appear to
    // be 'floating' the first dataset has a transparent color. The first
    // line is the bottom edge of the set of lines.
    new RGraph.SVG.Line({
        id: 'chart-container',
        data: [
            [84,65,3,15,12,22,95,5,35,45,85,85,23,45,62,52,45,31,53,66],
            [64,12,56,25,20,80,85,61,81,56,45,32,91,52,86,23,45,56,51,48],
            [48,5,23,12,16,36,49,130,52,95,45,21,65,35,28,75,59,74,86,23],
            [95,65,32,12,100,8,152,63,52,54,85,45,12,13,15,32,64,84,54,66]
        ],
        options: {
            marginLeft: 45,
            filled: true,
            filledAccumulative: true,
            
            // Here's the colors being set - note the first is transparent
            // so we don't see it.
            colors: ['transparent', '#FDA354', '#C4D6ED', '#609EC8'],

            spline: true,

            // Turn off the background grid vertical lines and its border
            backgroundGridVlines: false,
            backgroundGridBorder: false,

            xaxis: false,
            yaxis: false,
            textSize: 14,
            xaxisLabels: ['01','02','03','04','05','06','07','08','09','10','11','12','13','14','15','16','17','18','19','20'],
            responsive: [
                {maxWidth:null,width:600,height:250,parentCss:{'float':'right',textAlign: 'none'}},
                {maxWidth:850, width:450,height:200,parentCss:{'float':'none',textAlign:'center'}}
                
            ]
        }
    
    // Animate the chart with the trace() effect and add some responsive capability to
    // accommodate both large and small screens
    }).trace();
</script>