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### One-line summary [问题简述]
Incorrect value axis scale calculation in case of stack bar
### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]:
+ Browser version [浏览器类型和版本]:
+ OS Version [操作系统类型和版本]:
### Expected behaviour [期望结果]
In the below provided example, value axis max value should be less than 3.
### ECharts option [ECharts配置项]
<!-- Copy and paste your 'echarts option' here. -->
<!-- [下方贴你的option,注意不要删掉下方 ```javascript 和 尾部的 ``` 字样。最好是我们能够直接运行的
option。如何得到能运行的 option 参见上方的 guidelines for contributing] -->
```javascript
app.title = '坐标轴刻度与标签对齐';
option = {
tooltip : {
trigger: 'axis',
axisPointer : { // 坐标轴指示器,坐标轴触发有效
type : 'shadow' // 默认为直线,可选为:'line' | 'shadow'
}
},
grid: {
left: '3%',
right: '4%',
bottom: '3%',
containLabel: true
},
xAxis : [
{
type : 'category',
data : ['Mon', 'Tue', 'Wed'],
axisTick: {
alignWithLabel: true
}
}
],
yAxis : [
{
type : 'value'
}
],
series : [
{
name:'直接访问',
type:'bar',
stack:'a',
barWidth: '60%',
data:[[1,1]]
},
{
name:'直接访问',
type:'bar',
stack:'a',
barWidth: '60%',
data:[[0,1]]
},
{
name:'直接访问',
type:'bar',
stack:'a',
barWidth: '60%',
data:[[2,1]]
},
{
name:'直接访问',
type:'bar',
stack:'a',
barWidth: '60%',
data:[[2,1]]
}
],
};
```
### Other comments [其他信息]
<!-- For example: Screenshot or Online demo -->
<!-- [例如,截图或线上实例 (JSFiddle/JSBin/Codepen)] -->
[ Full content available at:
https://github.com/apache/incubator-echarts/issues/8980 ]
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