### html ###



<h4>CurvedLines: random data points </h4>

<div id="flotContainer" class="chart-style"></div>



<h4>CurvedLines: internally created helper points</h4>

<div id="flotContainer2" class="chart-style"></div>



### css ###



.chart-style {

    width: 600px;

    height: 260px;

}



### javascript ###



//random data

var d1 = []; var last = 0;

for (var i = 0; i <= 40; i += (2 + parseInt(Math.random() * 5))) {

    last = last + ((Math.random() * 3) - 1.5)

    d1.push([i, parseInt(last)]);

}



//flot options

var options = {

                 series: {

                     curvedLines: {

                                   active: true,

                                   nrSplinePoints: 20 // <- control nr of helper points

                     }                                // between two poins

                 }

              };

//plotting

$.plot($("#flotContainer"),[

    { //curved line

        data: d1,

        lines: {show: true, lineWidth: 3},

        curvedLines: {apply: true } // <- curve line

    }, { //original data points

        data: d1,

        points: {show: true}

    }      

], options);



$.plot($("#flotContainer2"),[

    { // <- helper points that are used to curve the lines

        data: d1,

        color: '#CC0000',

        points: {show: true},

        curvedLines: {apply: true}  //<- "curve" points

     }        

], options);