GitHub user HuJiayin reopened a pull request:

    https://github.com/apache/spark/pull/9794

    [SPARK-4036][MLlib]Add Conditional Random Fields (CRF) algorithm to Spark 
MLlib

    Conditional random fields (CRFs) are a class of statistical modelling 
method often applied in pattern recognition and machine learning, where they 
are used for structured prediction. I referenced the CRF++ for this 
implementation. 

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

    $ git pull https://github.com/HuJiayin/spark crf

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

    https://github.com/apache/spark/pull/9794.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 #9794
    
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commit d2db10cb5d01068761d8c927df2a69066c54faf4
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-11-18T05:04:42Z

    crf

commit 34b7cea4350bf14c22a5b43cc7a43be39b8dc281
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-11-18T06:35:03Z

    crf

commit 5d116903a8c4f05db2462bd895f4cceea82d4a29
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-12-01T07:52:54Z

    crf

commit ceac257491229f4afe0c2bd0372e913700bec5e9
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-12-02T02:33:37Z

    crf

commit 08c98a087c5fded7325b8ee62699d4a36a30dc9f
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-12-03T08:29:43Z

    crf

commit 87c6fffddaf20cf82852678a7d252df1c8dcf4c4
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-12-03T08:41:58Z

    Merge branch 'master' of https://github.com/apache/spark into crf

commit 5e5e3e14b5dfd82c05691b44cd876b923117bbf2
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-12-16T00:50:09Z

    crf(fix save load;refine unit test case)

commit 86ebec8717f8e10f0102b6cc6d6a5d31ebe01b22
Author: HuJiayin <jiayin...@intel.com>
Date:   2015-12-17T08:37:48Z

    crf add more test cases

commit 525eadbb12bfd901c939c13bbe955d22e152cc2b
Author: HuJiayin <jiayin...@intel.com>
Date:   2016-01-07T03:37:09Z

    fix file input from hdfs

commit c6f11a587ba7dd18edb14e63b5cf2b1a7c5f8d46
Author: HuJiayin <jiayin...@intel.com>
Date:   2016-01-07T08:11:49Z

    input

commit 731d015a2187cdbb5ad13dcd710d336dcc558fcc
Author: HuJiayin <jiayin...@intel.com>
Date:   2016-01-07T08:19:39Z

    input

commit b498cc41b72543cbdc6bc3bd54abf3f9ca3bca39
Author: HuJiayin <jiayin...@intel.com>
Date:   2016-01-08T04:12:09Z

    fix output

commit 38a857775807a38b7f92b3e21854994f0e4f3207
Author: HuJiayin <jiayin...@intel.com>
Date:   2016-01-08T06:03:33Z

    fixsaveload

commit 39a1be34fb9ddc900053a4cec5e4847c848bdd8c
Author: Jiayin Hu <jiayin...@intel.com>
Date:   2016-01-08T06:24:28Z

    Merge pull request #5 from HuJiayin/crf2
    
    merge crf2 to crf

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