errorbars.html

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	<title>Flot Examples</title>
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    <h1>Flot Examples</h1>

    <div id="placeholder" style="width:600px;height:400px;"></div>

    <p>With the errorbars plugin you can plot error bars to show standard deviation and other useful statistical properties.</p>

<script type="text/javascript" language="javascript">
$(function () {

    function drawArrow(ctx, x, y, radius){
        ctx.beginPath();
        ctx.moveTo(x + radius, y + radius);
        ctx.lineTo(x, y);
        ctx.lineTo(x - radius, y + radius);
        ctx.stroke();
    }

    function drawSemiCircle(ctx, x, y, radius){
        ctx.beginPath();
        ctx.arc(x, y, radius, 0, Math.PI, false);
        ctx.moveTo(x - radius, y);
        ctx.lineTo(x + radius, y);
        ctx.stroke();
    }

    //data1
    var data1 = [[1,1,.5,.1,.3], [2,2,.3,.5,.2], [3,3,.9,.5,.2],
                 [1.5,-.05,.5,.1,.3], [3.15,1.,.5,.1,.3],
                 [2.5,-1.,.5,.1,.3]];
    var data1_points = {
        show: true,
        radius: 5,
        fillColor: "blue", 
        errorbars: "xy", 
        xerr: {show: true, asymmetric: true, upperCap: "-", lowerCap: "-"}, 
        yerr: {show: true, color: "red", upperCap: "-"}
    };

    //data2
    var data2 = [[.7,3,.2,.4], [1.5,2.2,.3,.4], [2.3,1,.5,.2]];
    var data2_points = {
        show: true,
        radius: 5,
        errorbars: "y", 
        yerr: {show:true, asymmetric:true, upperCap: drawArrow, lowerCap: drawSemiCircle}
    };

    //data3
    var data3 = [[1,2,.4], [2,0.5,.3], [2.7,2,.5]];
    var data3_points = {
        //do not show points
        radius: 0,
        errorbars: "y", 
        yerr: {show:true, upperCap: "-", lowerCap: "-", radius: 5}
    };

    //data4
    var data4 = [[1.3, 1], [1.75, 2.5], [2.5, 0.5]];
    var data4_errors = [0.1, 0.4, 0.2];
    for (var i=0; i<data4.length; i++)
        data4_errors[i] = data4[i].concat(data4_errors[i])

    //plot
    var data = [{color: "blue", points: data1_points, data: data1, label: "data1"}, 
                {color: "red",  points: data2_points, data: data2, label: "data2"},
                {color: "green", lines: {show: true}, points: data3_points, data: data3, label: "data3"},
                // bars with errors
                {color: "orange", bars: {show: true, align: "center", barWidth: 0.25}, data: data4, label: "data4"},
                {color: "orange", points: data3_points, data: data4_errors}];
    var options = {legend: {position: "sw", show: true}, series: {lines: {show: false}},
                   xaxis: {min: 0.6, max: 3.1}, yaxis: {min: 0, max: 3.5},
                   zoom: {interactive: true}, pan: {interactive: true}
    };

    $.plot($("#placeholder"), data , options);
});
</script>

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