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### One-line summary [问题简述]
数据与坐标轴不一致
### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]:v4.2.0.rc1
+ Browser version [浏览器类型和版本]:68.0.3440.106
+ OS Version [操作系统类型和版本]:Win10
### Expected behaviour [期望结果]
恢复正常
### 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
option = {
title: {
text: '折线图堆叠'
},
tooltip: {
trigger: 'axis'
},
legend: {
data:['邮件营销','联盟广告','视频广告','直接访问','搜索引擎']
},
grid: {
left: '3%',
right: '4%',
bottom: '3%',
containLabel: true
},
toolbox: {
feature: {
saveAsImage: {}
}
},
xAxis: {
type: 'category',
boundaryGap: false,
data: ['周一','周二','周三','周四','周五','周六','周日']
},
yAxis: {
type: 'value'
},
series: [
{
name:'邮件营销',
type:'line',
stack: '总量',
data:[0, 0, 0, 0, 0, 0, 2]
},
{
name:'联盟广告',
type:'line',
stack: '总量',
data:[0, 0, 0, 0, 0, 0, 1]
},
{
name:'视频广告',
type:'line',
stack: '总量',
data:[0, 0, 0, 0, 0, 0, 1]
},
{
name:'直接访问',
type:'line',
stack: '总量',
data:[0, 0, 0, 0, 0, 0, 1]
},
{
name:'搜索引擎',
type:'line',
stack: '总量',
data:[0, 0, 0, 0, 0, 0, 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/9107 ]
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