var dataSource = [ { date: new Date(2013, 8, 6), moderate: 0.00, aggressive: 0.00, conservative: 0.00, tag: 'test' }, { date: new Date(2013, 8, 11), moderate: 0.0163, aggressive: 0.0263, conservative: 0.0134, tag: 'test' }, { date: new Date(2013, 8, 18), moderate: 0.0211, aggressive: 0.0214, conservative: 0.0318, tag: 'test' }, { date: new Date(2013, 8, 25), moderate: 0.0268, aggressive: 0.0231, conservative: 0.0293, tag: 'test' }, { date: new Date(2013, 9, 1), moderate: 0.0316, aggressive: 0.0224, conservative: 0.0426, tag: 'test' }, { date: new Date(2013, 9, 8), moderate: 0.0357, aggressive: 0.0202, conservative: 0.0560, tag: 'test' }, { date: new Date(2013, 9, 15), moderate: 0.0356, aggressive: 0.0105, conservative: 0.0639, tag: 'test' }, { date: new Date(2013, 9, 22), moderate: 0.0363, aggressive: 0.0124, conservative: 0.0577, tag: 'test' }, { date: new Date(2013, 9, 29), moderate: 0.0377, aggressive: 0.0115, conservative: 0.0737, tag: 'test' }, { date: new Date(2013, 10, 6), moderate: 0.0387, aggressive: 0.0114, conservative: 0.0902, tag: 'test' }, { date: new Date(2013, 10, 13), moderate: 0.0353, aggressive: 0.0117, conservative: 0.0163, tag: 'test' }, { date: new Date(2013, 10, 20), moderate: 0.0339, aggressive: 0.0114, conservative: 0.0163, tag: 'test' }, { date: new Date(2013, 10, 27), moderate: 0.0296, aggressive: 0.0150, conservative: 0.0163, tag: 'test' } ]; series = [ { valueField: 'conservative', name: 'Консервативный' }, { valueField: 'aggressive', name: 'Агрессивный' }, { valueField: 'moderate', name: 'Умеренный' } ]; $(function () { $("#chartContainer").dxChart({ dataSource: dataSource, commonSeriesSettings: { type: 'StackedLine', argumentField: 'date', tagField: 'tag', hoverMode: 'allArgumentPoints', selectionMode: 'allArgumentPoints' }, series: series, title: 'Population: Age Structure (2000)', argumentAxis: { valueMarginsEnabled: false, label: { overlappingBehavior: 'stagger', format: 'monthAndDay' }, grid: { visible: true } }, valueAxis: { label: { format: 'percent', precision: 2 }, tickInterval: 0.03, /* min: 0.01 */ }, legend: { horizontalAlignment: 'center', verticalAlignment: 'bottom' }, pointClick: function (clickedPoint) { $('#selectionSpan').html(clickedPoint.tag); }, tooltip: { enabled: true, argumentFormat: 'monthAndDay', format: 'percent', precision: 2, customizeText: function (e) { return e.valueText + ' in ' + e.argumentText; } } }); }); } ); подскажите как в сделать чтобы в "tooltip" (всплывающая подсказка) показывал разницу между текущей точкой (ее значение) и предыдущей! Т.е. если текущая точка 5.3% а предыдущая 4.7% то в tooltip'e отображалось 0.6%!
