3 Commits

Author SHA1 Message Date
Jiaming Yuan
851cba931e
Define best_iteration only if early stopping is used. (#9403)
* Define `best_iteration` only if early stopping is used.

This is the behavior specified by the document but not honored in the actual code.

- Don't set the attributes if there's no early stopping.
- Clean up the code for callbacks, and replace assertions with proper exceptions.
- Assign the attributes when early stopping `save_best` is used.
- Turn the attributes into Python properties.

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Co-authored-by: Philip Hyunsu Cho <chohyu01@cs.washington.edu>
2023-07-24 12:43:35 +08:00
Jiaming Yuan
e9c178f402
[doc] Document update [skip ci] (#8784)
- Remove version specifics in cat demo.
- Remove aws yarn.
- Update faq.
- Stop mentioning MPI.
- Update sphinx inventory links.
- Fix typo.
2023-02-12 04:25:22 +08:00
Jiaming Yuan
2cc9662005
Support slicing tree model (#6302)
This PR is meant the end the confusion around best_ntree_limit and unify model slicing. We have multi-class and random forests, asking users to understand how to set ntree_limit is difficult and error prone.

* Implement the save_best option in early stopping.

Co-authored-by: Philip Hyunsu Cho <chohyu01@cs.washington.edu>
2020-11-02 23:27:39 -08:00