GoranSMilovanovic added a comment.
Update `Thu 09 Apr 2020 10:19:24 PM UTC`: - XGBoost w. `gbtree` on a binary classification problem ("typical" vs. "extreme outlier" server response times) cross-validation started on **stat1005**; - using 9 data sets with varying number of features (<100 - 2000); - splitting test from train data for each data set; - running `xgboost` internal cross-validation controls; - cross-validating across: learning rate (`eta`, 4 levels), subsample (rows, 4 levels) parameter to build trees, `max_depth` (how deep trees are allowed, 4 levels); - number of iterations set to monotonically decrease with `eta`; - keeping `colsample_bytree` (proportion of features used to build each tree) fixed at .5; - setting `max_delta_step` to 1 - documented to be useful for highly unbalanced designs in binary classification (as ours is); - model selection: ROC Analysis -> AUC. Resource consumption: 32 cores, approx. 15Gb RAM. Approximate running time guesstimate: 24 - 30h. TASK DETAIL https://phabricator.wikimedia.org/T248308 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: GoranSMilovanovic Cc: JAllemandou, Lucas_Werkmeister_WMDE, Simon_Villeneuve, dcausse, Jakob_WMDE, Gehel, Addshore, Lydia_Pintscher, WMDE-leszek, Aklapper, darthmon_wmde, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
_______________________________________________ Wikidata-bugs mailing list Wikidata-bugs@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs