自定义标签

function() {

var point = this;

var series = this.series;

var points = this.points;/*获取当前分类下所有点*/

var validPoints = points.filter(function(p) {

return p.series.visible && p.visible && !p.isNull;/*获取当前分类下的有效点*/

});

var len = points.length;

var vlen = validPoints.length;

if (point == validPoints[vlen - 1]) {

var value = 0;

for (var i = -1; ++i < len;) {

if (points[i].series.visible) {

value += points[i].getTargetValue();/*获取点的值*/

}

}

return value;/*返回相加后的值*/

} else {

return "";/*返回各个系列的值*/

}

}