[GitHub] [incubator-echarts] cDanowski commented on issue #7136: Radar chart spokes disappears on mouse hovering

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cDanowski commented on issue #7136: Radar chart spokes disappears on mouse hovering
URL: https://github.com/apache/incubator-echarts/issues/7136#issuecomment-507669973
 
 
   Hi there,
   
   first of all, the project is great!
   
   I stumble over the same issue, when adding radar indicators whose value array contain 'null' entries. The data points are depicted correctly, but sometimes the lines are drawn correctly and sometimes (especially after interacting with the radar, i.e. hovering, tooltip, toolbox), the lines vanish and do not return.
   
   PROBLEM STATEMENT && VERSION:
   I use version 4.2.0-rc.2 of echarts.
   I have several indicators in radar, only two of them contain numeric values for the selected features, the rest is null. After selecting my features in map, I see the radar chart as expected (lines only connect the numeric points):
   
   ![image](https://user-images.githubusercontent.com/11268338/60514664-3eaf7300-9cda-11e9-9c2d-65bed8e40ca8.png)
   
   But as soon as I hover over any item to force the tooltip to show, or open diagram (or sometimes when adding another feature to radar), the lines connecting the data points of a certain feature with null values disappear.  Also the point color of the hovered item spreads to several data points, that actually do not belong to the feature entry (see by comparing both images)
   
   ![image](https://user-images.githubusercontent.com/11268338/60514810-8cc47680-9cda-11e9-9dc4-c2c15a1e4d9c.png)
   
   The lines will not come back by hovering or anything, also the "restore" toolbox-tool does not bring them back.
   
   EXPECTED BEHAVIOUR
   
   In my opinion, the lines should not vanish, but stay as in the first image.
   
   I hope I provided enough information and would be glad about any comment on this issue.
   
   Regards,
   Christian

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