
                xAxis: {min: -10, max: 10},
                yAxis: {},
                series: [{
                    name: 'no point',
                    type: 'line',
                    data: []
                }, {
                    name: 'one point',
                    type: 'line',
                    data: [[2, 43]]
                }, {
                    name: 'two points',
                    type: 'line',
                    data: [[2, 43], [4, 99]]
                }]
            });
       