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Guolin Ke authored and GitHub committed 0dfda826076
normalize the lambdas in lambdamart objective (#2331) * norm the lambda scores * change default to false * update doc * typo * Update Parameters.rst * Update config.h * Update test_sklearn.py * Update test_sklearn.py * Update test_sklearn.py * Update test_sklearn.py * Update test_sklearn.py * Update rank_objective.hpp * Update Parameters.rst * Update config.h * Update test_sklearn.py * Update test_sklearn.py * Update test_sklearn.py