xgboost: expose watchlist and callbacks#1859

Merged

larskotthoff merged 2 commits intomlr-org:masterfrom khotilov:xgb_watchlist

Jun 22, 2017

+45-22

Commits on Jun 20, 2017

xgboost: expose watchlist and callbacks; remove silent from params; set default lambda=1; add tweedie_variance_power param
khotilov
committed

Commits on Jun 22, 2017

disable TODO linter
khotilov
committed