Getting Started

Performance !!!

Chart Data

Bar and Column Charts

Line and Area Charts

Pie Charts

Scatter and Bubble Charts

Radar and Polar Charts

Financial Charts

Gantt Charts

Combinational Charts

Dynamic Charts

Working with Chart Axes

Chart Features

Customizing Chart

Client-Side Events




This sample demonstrates how to change (add, remove) chart data points.

To change the chart data, you can just change the data array and call the .jqChart("update") method. The jqChart will handle the rest.

For detailed implementation, please take a look at the HTML code tab.
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>
    Change Data Points Example - HTML5 jQuery Chart Plugin by jqChart
</title>
    <link rel="stylesheet" type="text/css" href="../css/jquery.jqChart.css" />
    <link rel="stylesheet" type="text/css" href="../css/jquery.jqRangeSlider.css" />
    <link rel="stylesheet" type="text/css" href="../themes/le-frog/jquery-ui-1.8.20.css" />
    <script src="../js/jquery-1.5.2.min.js" type="text/javascript"></script>
    <script src="../js/jquery.mousewheel.js" type="text/javascript"></script>
    <script src="../js/jquery.jqChart.min.js" type="text/javascript"></script>
    <script src="../js/jquery.jqRangeSlider.min.js" type="text/javascript"></script>
    <!--[if IE]><script lang="javascript" type="text/javascript" src="../js/excanvas.js"></script><![endif]-->
    
    <script lang="javascript" type="text/javascript">

        var background = {
            type: 'linearGradient',
            x0: 0,
            y0: 0,
            x1: 0,
            y1: 1,
            colorStops: [{ offset: 0, color: '#d2e6c9' },
                         { offset: 1, color: 'white'}]
        };

        var fillStyle = {
            type: 'linearGradient',
            x0: 0,
            y0: 0,
            x1: 1,
            y1: 0,
            colorStops: [{ offset: 0, color: '#65c2e8' },
                             { offset: 0.49, color: '#55b3e1' },
                             { offset: 0.5, color: '#3ba6dc' },
                             { offset: 1, color: '#2794d4'}]
        };

        $(document).ready(function () {

            $('#jqChart').jqChart({
                title: { text: 'Change Data Points' },
                border: { strokeStyle: '#6ba851' },
                background: background,
                series: [
                            {
                                title: 'Series',
                                type: 'column',
                                data: [20, 50, 40, 60, 70],
                                fillStyle: fillStyle
                            }
                        ]
            });

            $('#buttonAddPoint').click(function () {

                // get current series
                var series = $('#jqChart').jqChart('option', 'series');

                // get the data from the first series
                var data = series[0].data;

                // add new data item
                data.push(Math.round(Math.random() * 100));

                // update (redraw) the chart
                $('#jqChart').jqChart('update');
            });

            $('#buttonRemovePoint').click(function () {

                // get current series
                var series = $('#jqChart').jqChart('option', 'series');
                
                // get the data from the first series
                var data = series[0].data;

                // remove the last data item
                data.splice(data.length - 1, 1);

                // update (redraw) the chart
                $('#jqChart').jqChart('update');
            });
        });
    </script>

</head>
<body>
    <div id="jqChart" style="width: 500px; height: 300px;">
    </div>
    <br />
    <input id="buttonAddPoint" type="button" value="Add new point" />
    <input id="buttonRemovePoint" type="button" value="Remove last point" />
    <br />
</body>
</html>