Github user yinxusen commented on the pull request:

    https://github.com/apache/spark/pull/11126#issuecomment-183814813
  
    @keypointt I recommend adding the following code to the example, too. Then 
delete previous code from line 55-67. Meanwhile, we should move the line 53 
ahead and rephrase it.
    
    ```scala
    // Export the model to a String in PMML format
    clusters.toPMML
    
    // Export the model to a local file in PMML format
    clusters.toPMML("/tmp/kmeans.xml")
    
    // Export the model to a directory on a distributed file system in PMML 
format
    clusters.toPMML(sc,"/tmp/kmeans")
    
    // Export the model to the OutputStream in PMML format
    clusters.toPMML(System.out)
    ```
    
    @mengxr If we don't use https://github.com/apache/spark/pull/9430, I 
suggest to add those code together into a single file and rephrase those lines 
among those code snippets. Otherwise we get the following result:
    
    <img width="856" alt="screen shot 2016-02-13 at 7 33 28 pm" 
src="https://cloud.githubusercontent.com/assets/2637239/13031617/d1c46a6c-d288-11e5-9065-9b30ffcc5e29.png";>
    



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