java.lang.NullPointerException

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    • java.lang.NullPointerException at ciir.umass.edu.learning.tree.FeatureHistogram.findBestSplit(Unknown Source) at ciir.umass.edu.learning.tree.Split.split(Unknown Source) at ciir.umass.edu.learning.tree.RegressionTree.fit(Unknown Source) at ciir.umass.edu.learning.tree.LambdaMART.learn(Unknown Source) at ciir.umass.edu.learning.RankerTrainer.train(Unknown Source) at ciir.umass.edu.eval.Evaluator.evaluate(Unknown Source) at ciir.umass.edu.eval.Evaluator.main(Unknown Source)
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