[GitHub] spark issue #18337: [SPARK-21131][GraphX] Fix batch gradient bug in SVDPlusP...

[daniellaah <gi...@git.apache.org>]

Github user daniellaah commented on the issue:

    https://github.com/apache/spark/pull/18337
  
    I also tested the SVDPlusPlus on movielens-100k dataset. The algorithm just diverged. And the mse on the dataset gets 2.14748364347152E9.  
    I tested @lxmly 's code as well, it works but I don't know whether it is proper to use the 'mean gradient'.  
    @lxmly How do you get the conclusion 'using mean gradient'? Any reference? Thanks in advance.


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