<!--
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### One-line summary [问题简述]
Is it possible to remove the two symbols (the round and the arrow) on a
markLine ?
### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]: 4.0.4
+ 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]
I want to get a simple markline without any symbol on my chart. The problem is
when I use the `symbol: 'none'` property, it only removes the round symbol and
I still have the arrow.
```javascript
{
yAxis: MY_VALUE,
symbol: 'none'
}
```
I found a way to remove both:
```javascript
[
{
yAxis: MY_VALUE,
xAxis: startDate,
symbol: 'none'
},
{
yAxis: MY_VALUE,
xAxis: endDate,
symbol: 'none'
}
]
```
But with this solution, when i use the zoom on the chart, my marklines
disappears..
So, is there any way to get a simple markline without any the Symbols ?
### 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 = {
"tooltip": {
"trigger": "axis"
},
"grid": {
"top": 40,
"right": "10%",
"bottom": 80,
"left": "10%",
"height": 270
},
"xAxis": [
{
"nameLocation": "middle",
"data": [],
"nameGap": 30,
"splitLine": {
"show": false
},
"type": "time",
"position": "bottom",
"axisLabel": {}
}
],
"yAxis": [
{
"nameLocation": "middle",
"data": [],
"nameGap": 30,
"splitLine": {
"show": false
},
"type": "value",
"name": "Profondeur (m)",
"axisLabel": {},
"min": -40
}
],
"series": [
{
"name": "Mesure",
"type": "line",
"connectNulls": false,
"data": [
{
"value": [
"2017/08/31",
null
],
"date": 1504186980093
},
{
"value": [
"2017/09/01",
-16.84
],
"date": 1504216800000
},
{
"value": [
"2017/09/02",
-16.6
],
"date": 1504303200000
},
{
"value": [
"2017/09/03",
-16.18
],
"date": 1504389600000
},
{
"value": [
"2017/09/04",
-16.26
],
"date": 1504476000000
},
{
"value": [
"2017/09/05",
-15.35
],
"date": 1504562400000
},
{
"value": [
"2017/09/06",
-14.99
],
"date": 1504648800000
},
{
"value": [
"2017/09/07",
-14.92
],
"date": 1504735200000
},
{
"value": [
"2017/09/08",
-16.08
],
"date": 1504821600000
},
{
"value": [
"2017/09/09",
-16.24
],
"date": 1504908000000
},
{
"value": [
"2017/09/10",
-15.44
],
"date": 1504994400000
},
{
"value": [
"2017/09/11",
-15.75
],
"date": 1505080800000
}
],
"lineStyle": {
"normal": {
"color": "#3d72d2"
}
},
"itemStyle": {
"normal": {
"color": "#3d72d2"
}
},
"markLine": {
"data": [
[
{
"yAxis": -20.41,
"xAxis": "2017/08/31",
"symbol": "none"
},
{
"yAxis": -20.41,
"xAxis": "2017/09/11",
"symbol": "none",
"lineStyle": {
"normal": {
"color": "red",
"type": "solid"
}
}
}
],
[
{
"yAxis": -26.6,
"xAxis": "2017/08/31",
"symbol": "none"
},
{
"yAxis": -26.6,
"xAxis": "2017/09/11",
"symbol": "none",
"lineStyle": {
"normal": {
"color": "grey",
"type": "solid"
}
}
}
]
]
},
"markPoint": {
"symbolSize": 30,
"data": [
{
"xAxis": "2017/09/09",
"yAxis": -15.82,
"itemStyle": {
"color": "blue"
}
}
]
},
"showSymbol": false
}
],
"title": {
"text": "Année en cours",
"left": "center"
},
"dataZoom": [
{
"type": "inside",
"start": 0,
"end": 100
},
{
"start": 0,
"end": 100,
"handleSize": "80%",
"bottom": "0"
}
]
}
```
### 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/8992 ]
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