Type Members

1.  class Booster extends Serializable with KryoSerializable

   Booster for xgboost, this is a model API that support interactive build of an XGBoost Model

2.  abstract class Column extends AutoCloseable

   This Column abstraction provides an array interface JSON string, which is used to reconstruct columnar data within the XGBoost library.

3.  abstract class ColumnBatch extends Column

   This class wraps multiple Column and provides the array interface json for all columns.

4.  class Communicator extends AnyRef

   Collective communicator global class for synchronization.

   Collective communicator global class for synchronization.

   Currently the communicator API is experimental, function signatures may change in the future without notice.

5.  class ConfigContext extends AutoCloseable

   Global configuration context for XGBoost.

   Global configuration context for XGBoost.

   Version

   3.0.0 See the parameter document for supported global configuration. The configuration is restored upon close.

6.  class DMatrix extends AnyRef

   DMatrix for xgboost.

7.  class ExternalCheckpointManager extends AnyRef

   This class contains the methods that are required for managing the state of the training process.

   This class contains the methods that are required for managing the state of the training process. The training state is stored in a distributed file system, that consists of UBJ (Universal Binary JSON) model files. The class provides methods for saving, loading and cleaning up checkpoints.

8.  trait IEvaluation extends Serializable

   interface for customized evaluation

9.  trait IObjective extends Serializable

   interface for customize Object function

10.  trait ITracker extends UncaughtExceptionHandler

    Interface for a tracker implementations with three public methods:

    Interface for a tracker implementations with three public methods:

    • start(timeout): Start the tracker awaiting for worker connections, with a given timeout value (in seconds).
    • getWorkerArgs(): Return the arguments needed to initialize Rabit clients.
    • waitFor(timeout): Wait for the task execution by the worker nodes for at most timeout milliseconds.

    Each implementation is expected to implement a callback function

    public void uncaughtException(Threat t, Throwable e) { ... }

    to interrupt waitFor() in order to prevent the tracker from hanging indefinitely.

    The Rabit tracker handles connections from distributed workers, assigns ranks to workers, and brokers connections between workers.

11.  class RabitTracker extends ITracker

    Java implementation of the Rabit tracker to coordinate distributed workers.

12.  class TrackerProperties extends AnyRef
13.  class XGBoost extends AnyRef

    trainer for xgboost

14.  class XGBoostError extends Exception

    custom error class for xgboost