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The Bezier curve renderer can distinguish between two different input data formats. This first example has the data passed in as 2 data points, the second one defining the Bezier curve to the end point. With this format, non-default axes renderers will require specifying the minimum and maximum on the axes.

    [[xstart, ystart], [cp1x, cp1y, cp2x, cp2y, xend, yend]];
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$(document).ready(function(){
     
    var line1 = [[0, 1], [2, 2, 4, .5, 6, 0]];
    var line2 = [[0, 5], [2, 6, 5, 1, 6, .5]];
    var line3 = [[0, 6], [3, 9, 4, 8, 6, 3]];
    var line4 = [[0, 7], [2, 9, 4, 8, 6, 6]];
    var line5 = [[0, 8], [3, 9, 4, 8, 6, 8]];
 
    plot1 = $.jqplot("chart1", [line1,line2, line3, line4, line5], {
           seriesDefaults: {renderer:$.jqplot.BezierCurveRenderer},
           legend:{show:true}
    });
});

This second example has the data broken out into 4 points, which will be assembled to define the Bezier Curve. With this format, any axes renderer can be used without explicitly specifying the minimum and maximum.

    [[xstart, ystart], [cp1x, cp1y], [cp2x, cp2y], [xend, yend]];
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$(document).ready(function(){
     
    var s1 = [[0, 1], [2, 2], [4, .5], [6, 0]];
    var s2 = [[0, 5], [2, 6], [5, 1], [6, .5]];
    var s3 = [[0, 6], [3, 9], [4, 8], [6, 3]];
    var s4 = [[0, 7], [2, 9], [4, 8], [6, 6]];
    var s5 = [[0, 8], [3, 9], [4, 8], [6, 8]];
 
    plot2 = $.jqplot("chart2", [s1,s2, s3, s4, s5], {
           seriesDefaults: {renderer:$.jqplot.BezierCurveRenderer},
           legend:{show:true}
    });
});

Here is an example using a date axis renderer with Bezier curves. The data looks like:

    [['01/01/2010', 6], ['02/01/2010', 9], ['03/01/2010', 8], ['04/01/2010', 3]]
1-Jan-2010
1-Feb-2010
1-Mar-2010
1-Apr-2010
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$(document).ready(function(){
     
    var s1 = [['01/01/2010', 1], ['02/01/2010', 2], ['03/01/2010', .5], ['04/01/2010', 0]];
    var s2 = [['01/01/2010', 5], ['02/01/2010', 6], ['03/01/2010', 1], ['04/01/2010', .5]];
    var s3 = [['01/01/2010', 6], ['02/01/2010', 9], ['03/01/2010', 8], ['04/01/2010', 3]];
    var s4 = [['01/01/2010', 7], ['02/01/2010', 9], ['03/01/2010', 8], ['04/01/2010', 6]];
    var s5 = [['01/01/2010', 8], ['02/01/2010', 9], ['03/01/2010', 8], ['04/01/2010', 8]];
 
    plot3 = $.jqplot("chart3", [s1,s2, s3, s4, s5], {
           seriesDefaults: {renderer:$.jqplot.BezierCurveRenderer},
           axes:{xaxis:{renderer:$.jqplot.DateAxisRenderer, numberTicks:4}},
           legend:{show:true}
    });
});

The charts on this page depend on the following files:

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<script type="text/javascript" src="../jquery.min.js"></script>
<script type="text/javascript" src="../jquery.jqplot.min.js"></script>
<script type="text/javascript" src="../plugins/jqplot.BezierCurveRenderer.min.js"></script>
<script type="text/javascript" src="../plugins/jqplot.dateAxisRenderer.min.js"></script>
<link rel="stylesheet" type="text/css" hrf="../jquery.jqplot.min.css" />