[GitHub] VitoriaTang opened a new issue #8910: 散点图中，离散型X轴，VisualMap使用同一X轴离散变量，图画不出来

[GitBox <gi...@apache.org>]

VitoriaTang opened a new issue #8910: 散点图中，离散型X轴，VisualMap使用同一X轴离散变量，图画不出来
URL: https://github.com/apache/incubator-echarts/issues/8910
 
 
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   ### One-line summary [问题简述]
   
   散点图中，离散字段X轴（category type），VisualMap使用同一X轴离散字段，图画不出来。
   如果使用不同的离散字段，可以画图。
   如果X轴为连续型（value type），VisualMap使用同一字段，可以画图。
   
   
   ### 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]: Chrome 68.0 or Firefox 52.9
   + OS Version [操作系统类型和版本]: Windows 10
   
   
   
   
   
   ### Expected behaviour [期望结果]
   可以正常画图
   
   
   
   ### 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
   var dataBJ = [
       [1,55,"良","良B"],
       [2,25,"优","优A"],
       [3,56,"良","良B"],
       [4,33,"优","优A"],
       [5,42,"优","优A"],
       [6,82,"良","良B"],
       [9,267,"重度污染","重度污染E"],
       [10,185,"中度污染","中度污染B"],
       [14,108,"轻度污染","轻度污染C"],
       [15,108,"轻度污染","轻度污染C"]
   ];
   
   
   option = {
       color: [
           '#dd4444', '#fec42c', '#80F1BE'
       ],
       grid: {
           left: '10%',
           right: 200,
           top: '15%',
           bottom: '10%'
       },
       xAxis: {
           type: 'category',
           name: 'x',
           nameGap: 16,
           nameTextStyle: {
               fontSize: 14
           },
           splitLine: {
               show: false
           },
       },
       yAxis: {
           type: 'value',
           name: 'AQI指数',
           nameLocation: 'end',
           nameGap: 20,
           nameTextStyle: {
               fontSize: 20
           },
           splitLine: {
               show: false
           }
       },
       visualMap: [
           {
               left: null,
               right: 0,
               dimension: 2,
               categories: ['严重污染', '重度污染', '中度污染', '轻度污染', '良', '优'],
               inRange: {
                   symbolSize: 30,
                   symbol: {
                       '优': 'diamond',
                       '': 'circle'
                   }
               },
           }
       ],
       series: [
           {
               name: '北京',
               type: 'scatter',
               data: dataBJ,
               encode:{
                   x:2,y: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)] -->
   
   

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