Support sklearn cross validation for ranker. #8859
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- Add a convention for X to include a special `qid` column. sklearn utilities consider only `X`, `y` and `sample_weight` for supervised learning algorithms, but we need an additional qid array for ranking. It's important to be able to support the cross validation function in sklearn since all other tuning functions like grid search are based on cross validation.
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qidcolumn.sklearn utilities consider only
X,y, andsample_weightfor supervised learning algorithms, but we need an additional qid array for ranking.It's important to be able to support the cross-validation function in sklearn since all other tuning functions like grid search are based on cross-validation.
I plan to deprecate the use of
group.qidis the most widely used convention in learning to rank implementations.Extracted from #8822 .