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[jvm-packages] fix comments in objectiveTrait (#4174)

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Nan Zhu 2019-02-22 00:32:13 -08:00 committed by GitHub
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jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/ObjectiveTrait.scala
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@ -27,7 +27,7 @@ trait ObjectiveTrait extends IObjective {
*
* @param predicts untransformed margin predicts
* @param dtrain training data
* @return List with two float array, correspond to first order grad and second order grad
* @return List with two float array, correspond to grad and hess
*/
def getGradient(predicts: Array[Array[Float]], dtrain: DMatrix): List[Array[Float]]