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 (£129) commercial license available.

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Using the CSV reader

[No canvas support]

Here we have a very simple example of the csv Reader that is bundled with RGraph. This is in addition to the RGraph.AJAX.getCSV function.

The code that fetches the data is this:

var data = csv.getRow(0, 1);

This code fetches the first row (the zero-indexed first argument) and the second argument stipulates that the first element of that row should be ignored (ie starting from column 1 instead of column 0.

The only other configuration for the chart is the stipulation of the labels and an increase in the size of the left margin.

This goes in the documents header:
<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.csv.js"></script>
<script src="RGraph.hbar.js"></script>
Put this where you want the chart to show up:
<div  style="float: right">
    <canvas id="cvs" width="500" height="250">[No canvas support]</canvas>
This is the code that generates the chart - it should be placed AFTER the canvas tag(s):
    // Use the CSV connector to read the sample.csv file from the server
    new RGraph.CSV({url: '/sample.csv', callback: function (csv)
        // Fetch the first row of the CSV file, starting at the second column
        // (as with many things in programming - counting starts at zero)
        var data = csv.row(0, 1);

        // Create and show the Horizontal Bar chart using the data that was
        // retrieved from the CSV file. The only other configuration is the
        // addition of some labels and widening the left margin.
        new RGraph.HBar({
            id: 'cvs',
            data: data,
            options: {
                yaxisLabels: ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday'],
                marginLeft: 95,
                responsive: [
                    {maxWidth: null,parentCss:{'float':'right',textAlign:'none'}},
                    {maxWidth: 750,parentCss:{'float':'none',textAlign:'center'}}