apache/spark — pull request #1671 by mengxr (2014-07-30 22:26:28+00:00)
Title: [SPARK-2511][MLLIB] add HashingTF and IDF

This is roughly the TF-IDF implementation used in the Databricks Cloud Demo: http://databricks.com/cloud/ .

Both `HashingTF` and `IDF` are implemented as transformers, similar to scikit-learn.