hex

Class StackedEnsembleModel

java.lang.Object

water.Iced<T>

water.Keyed<T>

water.Lockable<M>

hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>

hex.StackedEnsembleModel

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, water.Freezable<StackedEnsembleModel>

public class StackedEnsembleModel
extends hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>

An ensemble of other models, created by stacking with the SuperLearner algorithm or a variation.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StackedEnsembleModel.StackedEnsembleOutput
static class	StackedEnsembleModel.StackedEnsembleParameters

Nested classes/interfaces inherited from class hex.Model

hex.Model.BigScore, hex.Model.DeepFeatures, hex.Model.ExemplarMembers, hex.Model.GetMostImportantFeatures, hex.Model.GLRMArchetypes, hex.Model.GridSortBy, hex.Model.InteractionPair, hex.Model.JavaModelStreamWriter, hex.Model.LeafNodeAssignment, hex.Model.Output, hex.Model.Parameters

Field Summary

Fields

Modifier and Type	Field and Description
hex.Model.Parameters.FoldAssignmentScheme	fold_assignment
java.lang.String	fold_column
hex.ModelCategory	modelCategory
int	nfolds
java.lang.String	responseColumn
long	seed
long	trainingFrameChecksum

Fields inherited from class hex.Model

_dist, _output, _parms, _toDelete, _warnings, scoringInfo

Fields inherited from class water.Lockable

_lockers

Fields inherited from class water.Keyed

_key

Constructor Summary

Constructors

Constructor and Description
StackedEnsembleModel(water.Key selfKey, StackedEnsembleModel.StackedEnsembleParameters parms, StackedEnsembleModel.StackedEnsembleOutput output)

Method Summary

Methods

Modifier and Type	Method and Description
void	checkAndInheritModelProperties()
void	doScoreMetrics(water.Job job)
hex.ModelMetrics	doScoreMetricsOneFrame(water.fvec.Frame frame, water.Job job)
hex.ModelMetrics.MetricBuilder	makeMetricBuilder(java.lang.String[] domain)
protected water.fvec.Frame	predictScoreImpl(water.fvec.Frame fr, water.fvec.Frame adaptFrm, java.lang.String destination_key, water.Job j, boolean computeMetrics) For StackedEnsemble we call score on all the base_models and then combine the results with the metalearner to create the final predictions frame.
protected water.Keyed	readAll_impl(water.AutoBuffer ab, water.Futures fs) Read in models (base + metalearner)
protected water.Futures	remove_impl(water.Futures fs)
protected double[]	score0(double[] data, double[] preds) Should never be called: the code paths that normally go here should call predictScoreImpl().
protected water.AutoBuffer	writeAll_impl(water.AutoBuffer ab) Write out models (base + metalearner)

Methods inherited from class hex.Model

adaptTestForTrain, adaptTestForTrain, addMetrics, addModelMetrics, addWarning, auc, checksum_impl, classification_error, cleanup_adapt, closeBigScorePredict, compareTo, computeDeviances, data, defaultThreshold, deleteCrossValidationModels, deviance, deviance, fillScoringInfo, getDefaultGridSortBy, getMojo, getToEigenVec, isSupervised, last_scored, lift_top_group, logloss, loss, mae, makeBigScoreTask, makeInteraction, makeInteractions, makeInteractions, makeSchema, makeScoringNames, mean_per_class_error, mse, postProcessPredictions, rmsle, score, score, score, score, score, score0, score0, score0, scoreMetrics, scoring_history, scoringDomains, setupBigScorePredict, testJavaScoring, testJavaScoring, testJavaScoring, toJava, toJava, toJava, toJavaCheckTooBig, toJavaInit, toJavaNCLASSES, toJavaPredictBody, toJavaPROB, toJavaSuper, toString

Methods inherited from class water.Lockable

delete_and_lock, delete_and_lock, delete_and_lock, delete, delete, delete, read_lock, read_lock, read_lock, unlock_all, unlock, unlock, unlock, unlock, update, update, update, write_lock, write_lock, write_lock

Methods inherited from class water.Keyed

checksum, readAll, remove, remove, remove, remove, writeAll

Methods inherited from class water.Iced

asBytes, clone, copyOver, frozenType, read, readExternal, readJSON, reloadFromBytes, toJsonString, write, writeExternal, writeJSON

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

modelCategory

public hex.ModelCategory modelCategory

trainingFrameChecksum

public long trainingFrameChecksum

responseColumn

public java.lang.String responseColumn

nfolds

public int nfolds

fold_assignment

public hex.Model.Parameters.FoldAssignmentScheme fold_assignment

fold_column

public java.lang.String fold_column

seed

public long seed

Constructor Detail

StackedEnsembleModel

public StackedEnsembleModel(water.Key selfKey,
                    StackedEnsembleModel.StackedEnsembleParameters parms,
                    StackedEnsembleModel.StackedEnsembleOutput output)

Method Detail

predictScoreImpl

protected water.fvec.Frame predictScoreImpl(water.fvec.Frame fr,
                                water.fvec.Frame adaptFrm,
                                java.lang.String destination_key,
                                water.Job j,
                                boolean computeMetrics)

For StackedEnsemble we call score on all the base_models and then combine the results with the metalearner to create the final predictions frame.

Overrides:

predictScoreImpl in class hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>

Parameters:

adaptFrm - Already adapted frame

computeMetrics -

Returns:

A Frame containing the prediction column, and class distribution

See Also:

Model.predictScoreImpl(Frame, Frame, String, Job, boolean)

score0

protected double[] score0(double[] data,
              double[] preds)

Should never be called: the code paths that normally go here should call predictScoreImpl().

Specified by:

score0 in class hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>

See Also:

Model.score0(double[], double[])

makeMetricBuilder

public hex.ModelMetrics.MetricBuilder makeMetricBuilder(java.lang.String[] domain)

Specified by:

makeMetricBuilder in class hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>

doScoreMetricsOneFrame

public hex.ModelMetrics doScoreMetricsOneFrame(water.fvec.Frame frame,
                                      water.Job job)

doScoreMetrics

public void doScoreMetrics(water.Job job)

checkAndInheritModelProperties

public void checkAndInheritModelProperties()

remove_impl

protected water.Futures remove_impl(water.Futures fs)

Overrides:

remove_impl in class hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>

writeAll_impl

protected water.AutoBuffer writeAll_impl(water.AutoBuffer ab)

Write out models (base + metalearner)

Overrides:

writeAll_impl in class hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>

readAll_impl

protected water.Keyed readAll_impl(water.AutoBuffer ab,
                       water.Futures fs)

Read in models (base + metalearner)

Overrides:

readAll_impl in class hex.Model<StackedEnsembleModel,StackedEnsembleModel.StackedEnsembleParameters,StackedEnsembleModel.StackedEnsembleOutput>