             var max = -Infinity;
                data = echarts.util.map(bins.data, function (item, index) {
                    var x0 = bins.bins[index].x0;
                    var x1 = bins.bins[index].x1;
                    interval = x1 - x0;
                    min = Math.min(min, x0);
                    max = Math.max(max, x1);
                    return [x0, x1, item[1]];
                });

                function renderItem(params, api) {
                    var yValue = api.value(2);
       