[GitHub] zeppelin issue #2194: [ZEPPELIN-2229] Providing workaround for nvd3 voronoi

[soralee]

Github user soralee commented on the issue:

    https://github.com/apache/zeppelin/pull/2194
  
    I checked the similar issue ["TypeError: Cannot read property '1' of 
undefined" in the bar 
chart](https://issues.apache.org/jira/browse/ZEPPELIN-2273) we have. 
    This error is occured when changing radio button from `Grouped` to 
`Stacked` like the following screenshot.
    
![z_stack_error](https://cloud.githubusercontent.com/assets/8110458/24394371/b810c2ec-13d6-11e7-8a86-5cb59b1cee8f.png)
    
    
    But, Fortunately, there is no problem in this branch so, we can also 
resolve it with this PR!
    
![z2273_no_error](https://cloud.githubusercontent.com/assets/8110458/24394363/ad8312ee-13d6-11e7-9d2c-fb729602460d.gif)
    
    
![z2273_no_error2](https://cloud.githubusercontent.com/assets/8110458/24394543/4f9034cc-13d7-11e7-9ea5-b901d191640e.gif)



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