GitHub user mengxr opened a pull request:

    https://github.com/apache/spark/pull/4052

    [SPARK-5254][MLLIB] Update the user guide to position spark.ml better

    The current statement in the user guide may deliver confusing messages to 
users. spark.ml contains high-level APIs for building ML pipelines. But it 
doesn't mean that spark.mllib is being deprecated.
    
    First of all, the pipeline API is in its alpha stage and we need to see 
more use cases from the community to stabilizes it, which may take several 
releases. Secondly, the components in spark.ml are simple wrappers over 
spark.mllib implementations. Neither the APIs or the implementations from 
spark.mllib are being deprecated. We expect users use spark.ml pipeline APIs to 
build their ML pipelines, but we will keep supporting and adding features to 
spark.mllib. For example, there are many features in review at 
https://spark-prs.appspot.com/#mllib. So users should be comfortable with using 
spark.mllib features and expect more coming. The user guide needs to be updated 
to make the message clear.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/mengxr/spark SPARK-5254

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/4052.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #4052
    
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commit 0cc935be54f253970c1a81bc761ef36a40c957fd
Author: Xiangrui Meng <[email protected]>
Date:   2015-01-14T21:56:28Z

    update user guide to position spark.ml better

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