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Expose user/item factors in DataFrames. This is to be more consistent with the pipeline API. It also helps maintain consistent APIs across languages. This PR also removed fitting params from `ALSModel`. coderxiang Author: Xiangrui Meng <meng@databricks.com> Closes #6468 from mengxr/SPARK-7922 and squashes the following commits: 7bfb1d5 [Xiangrui Meng] update ALSModel in PySpark 1ba5607 [Xiangrui Meng] use DataFrames for user/item factors in ALS |
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