canonizer and trivialfis Column sampling at individual nodes (splits). (#3971)
* Column sampling at individual nodes (splits).

* Documented colsample_bynode parameter.

- also updated documentation for colsample_by* parameters

* Updated documentation.

* GetFeatureSet() returns shared pointer to std::vector.

* Sync sampled columns across multiple processes.
Latest commit 42bf90e Dec 14, 2018

README.md

This folder contains testcases for xgboost.