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RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 15 years old) and has a wealth of features making it an ideal choice to show charts on your website.

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Get the latest version of RGraph (version 6.17) from the download page. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£99) commercial license available.

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SVG Bipolar updated to support uneven data

Written by Richard Heyes, RGraph author, on 1st April 2022

This isn't an April Fools joke I promise (!) - the svg Bipolar chart has been updated to support uneven data. What does this mean? Well just take a look at the image shown here - you can now mix regular and grouped/stacked sets of bars on the same chart and it won't explode! Which is nice. 

<script>
    new RGraph.SVG.Bipolar({
        id: 'chart-container',
        left: [[4,5,1],8,6,[4,8,8],[5,1,2,3],1,[8,6]],
        right: [9,[5,4,3,5],[4,2],4,1,[8,8,4,3],[4,5]],
        options: {
            tooltips: 'Value: %{value}',
            yaxisLabels: ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday'],
            textSize: 16,
            textBold: true
        }
    }).draw();
</script>