A basic Bar chart using CSV data

This basic example uses AJAX to request a CSV file from the server and then parses it with Javascript to convert it into usable data. You can see the CSV file here.

Note: In October 2013 a new CSV reader was added to RGraph. It makes reading CSV files much easier. You can read about the new CSV reader here.

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.bar.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 ()
    {
        /**
        * This is the callback for the AJAX request
        */
        var callback = function ()
        {
            // Parse the AJAX result text
            var data   = this.responseText.split(/\r?\n/);
            var labels = [];
            
            // Handle the response
            for (var i=0; i<data.length; ++i) {
                var row = data[i].split(/,/);
                labels.push(row[0]);

                var newrow = [];

                for (var j=1; j<row.length; ++j) {
                    newrow.push(Number(row[j]));
                }

                data[i] = newrow;
            }

            var bar = new RGraph.Bar({
                id: 'cvs',
                data: data,
                options: {
                    textAccessible: true,
                    grouping: 'stacked',
                    labels: labels,
                    colors: ['red','blue','yellow','pink','black','gray','green']
                }
            }).draw();
        }


        /**
        * Make the AJAX call that fetches the CSV data
        */
        RGraph.AJAX('/sample.csv', callback);
    };
</script>