在基本使用说明中，纵向分组只有一个地区，实际可以添加多列作为纵向分组  实际的数据效果：  json数据集数据： ``` { "data": [{ "region": "华东", "sales": 1000, "gifts": 100, "month": "1月", "province": "安徽", "city": "合肥" },{ "region": "华东", "sales": 1000, "gifts": 100, "month": "1月", "province": "安徽", "city": "安庆" },{ "region": "华东", "sales": 1000, "gifts": 100, "month": "2月", "province": "安徽", "city": "安庆" },{ "region": "华东", "sales": 1000, "gifts": 100, "month": "2月", "province": "安徽", "city": "合肥" },{ "region": "华北", "sales": 1000, "gifts": 100, "month": "1月", "province": "河北", "city": "邯郸" },{ "region": "华北", "sales": 1000, "gifts": 100, "month": "2月", "province": "河北", "city": "邯郸" },{ "region": "华南", "sales": 2000, "gifts": 200, "month": "2月", "province": "广东", "city": "广州" },{ "region": "华南", "sales": 3000, "gifts": 300, "month": "1月", "province": "广东", "city": "广州" },{ "region": "华南", "sales": 5000, "gifts": 600, "month": "1月", "province": "广东", "city": "深圳" },{ "region": "华南", "sales": 6000, "gifts": 600, "month": "2月", "province": "广东", "city": "深圳" },{ "region": "华北", "sales": 7000, "gifts": 600, "month": "2月", "province": "河北", "city": "唐山" },{ "region": "华北", "sales": 7000, "gifts": 600, "month": "1月", "province": "河北", "city": "唐山" },{ "region": "华南", "sales": 2000, "gifts": 200, "month": "2月", "province": "广西", "city": "南宁" },{ "region": "华南", "sales": 3000, "gifts": 300, "month": "1月", "province": "广西", "city": "南宁" },{ "region": "华南", "sales": 5000, "gifts": 600, "month": "1月", "province": "广西", "city": "桂林" },{ "region": "华南", "sales": 6000, "gifts": 600, "month": "2月", "province": "广西", "city": "桂林" }] } ```