Fix incorrect effect_learner_objective in XGBRRegressor #504
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Proposed changes
This PR fixes #501.
Currently the default value of
effect_learner_objective
inXGBRRegressor
is incorrectly set torank:pairwise
, which is for classification.This PR updates it to
reg:squarederror
, and also splits the test forXGBRRegressor
withsample_weights
from one forBaseRClassifier
withsample_weights
.Types of changes
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