Jiaming Yuan e7ac2486eb
[backport] [R] Fix global feature importance and predict with 1 sample. (#7394) (#7397)
* [R] Fix global feature importance.

* Add implementation for tree index.  The parameter is not documented in C API since we
should work on porting the model slicing to R instead of supporting more use of tree
index.

* Fix the difference between "gain" and "total_gain".

* debug.

* Fix prediction.
2021-11-06 00:07:36 +08:00
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2018-07-19 14:22:16 -07:00
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2018-07-19 14:22:16 -07:00
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