Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/4709#issuecomment-75626645
[Test build #27860 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/27860/consoleFull)
for PR 4709 at commit
[`19a8a4e`](https://github.com/apache/spark/commit/19a8a4e9b8c3b5607c87fb1eae19810f90b9ad6a).
* This patch **passes all tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* `ChiSqSelector stands for Chi-Squared feature selection. It operates on
the labeled data. ChiSqSelector orders categorical features based on their
values of Chi-Squared test on independence from class and filters (selects) top
given features. `
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