[GitHub] [incubator-echarts] elephantme commented on issue #8848: 4.1.0版本双坐标轴绘柱状图bug

[GitHub]

@Ovilia 当设置scale为true时，坐标轴下方溢出了（4.1.0版本）

![echart-bar](https://user-images.githubusercontent.com/20337682/45530722-aa455400-b81e-11e8-990d-9fd6885ab43a.png)

option配置如下：

```javascript
option = {
    "xAxis": {
        "type": "category",
        "axisLabel": {
            "rotate": 45
        }
    },
    "yAxis": {
        "type": "value",
        "scale": true
    },
    "legend": {
        "show": true
    },
    "dataset": {
        "dimensions": [
            {
                "name": "005",
                "displayName": "日期"
            },
            {
                "name": "002",
                "displayName": "新用户"
            },
            {
                "name": "003",
                "displayName": "老用户"
            },
            {
                "name": "004",
                "displayName": "主页面用户数"
            },
            {
                "name": "006",
                "displayName": "登出用户数"
            }
        ],
        "source": [
            {
                "002": 30000,
                "003": 18000,
                "004": 12300,
                "006": 23409,
                "005": "支付电费支付电费支付电费"
            },
            {
                "002": 32000,
                "003": 18600,
                "004": 14400,
                "006": 25012,
                "005": "2017-01-02"
            },
            {
                "002": 23000,
                "003": 18700,
                "004": 13400,
                "006": 13456,
                "005": "2017-01-03"
            },
            {
                "002": 24000,
                "003": 18200,
                "004": 14500,
                "006": 13466,
                "005": "2017-01-04"
            },
            {
                "002": 14000,
                "003": 17600,
                "004": 12800,
                "006": 15690,
                "005": "2017-01-05"
            }
        ]
    },
    "series": [
        {
            "key": "002",
            "name": "新用户",
            "type": "bar"
        },
        {
            "key": "003",
            "name": "老用户",
            "stack": "test01",
            "type": "bar"
        },
        {
            "key": "004",
            "name": "主页面用户数",
            "type": "bar"
        },
        {
            "key": "006",
            "name": "登出用户数",
            "type": "bar"
        }
    ],
    "tooltip": {
        "trigger": "axis"
    }
}
```

[ Full content available at: 
https://github.com/apache/incubator-echarts/issues/8848 ]
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