xgboost4j_2.12 1.4.1 API < Back
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# Packages

-  package root
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    root
-  package ml
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    root
-  package dmlc
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    ml
-  package xgboost4j
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    dmlc
-  package java
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-  package util
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- Booster
- DMatrix
- ExternalCheckpointManager
- GpuTestSuite
- IEvaluation
- IObjective
- IRabitTracker
- Rabit
- RabitTracker
- TrackerProperties
- XGBoost
- XGBoostError

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ml.dmlc.xgboost4j.java

# IEvaluation 

###

#### trait IEvaluation extends Serializable

interface for customized evaluation

Linear Supertypes
Serializable, AnyRef, Any
Known Subclasses
EvalTrait
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### Abstract Value Members

1.  abstract def eval(predicts: Array[Array[Float]], dmat: DMatrix): Float

   evaluate with predicts and data

   evaluate with predicts and data

   predicts

     predictions as array

   dmat

     data matrix to evaluate

   returns

     result of the metric

2.  abstract def getMetric(): String

   get evaluate metric

   get evaluate metric

   returns

     evalMetric

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