[GitHub] spark issue #18025: [WIP][SparkR] Grouped documentation for sql functions

[actuaryzhang]

Github user actuaryzhang commented on the issue:

    https://github.com/apache/spark/pull/18025
  
    - New commit now resolves the Name issue. `@title` does not work, which is 
the header in the second line `\title{Aggregate functions for Column 
operations}`. The solution is to use `@name NULL` for the generics.  Now we 
have:
    
    
![image](https://cloud.githubusercontent.com/assets/11082368/26437454/3780b8d4-40d2-11e7-83e9-80eec206f000.png)
    
    - Also added several more practical examples. But most of these functions 
are very straightforward to use. 
    
    
![image](https://cloud.githubusercontent.com/assets/11082368/26437488/5be621be-40d2-11e7-8df8-0e5c99fb6ef6.png)
     



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