edu.udo.cs.yale.operator.learner.lazy
Class DefaultModel

java.lang.Object
  edu.udo.cs.yale.operator.AbstractIOObject
      edu.udo.cs.yale.operator.ResultObjectAdapter
          edu.udo.cs.yale.operator.AbstractModel
              edu.udo.cs.yale.operator.IOModel
                  edu.udo.cs.yale.operator.learner.PredictionModel
                      edu.udo.cs.yale.operator.learner.lazy.DefaultModel

All Implemented Interfaces:

IOObject, Model, ResultObject, Saveable

public class DefaultModel
extends PredictionModel

The default model sets the prediction of all examples to the mode value in case of nominal labels and to the average value in case of numerical labels.

Version:

$Id: DefaultModel.java,v 1.14 2006/09/30 00:05:31 ingomierswa Exp $

Author:

Stefan Rueping, Ingo Mierswa

Field Summary

private double[]	confidences The confidence values for all predictions.
private double	value The default prediction.

Constructor Summary

DefaultModel()
Creates a new default model after loading it from disk.

DefaultModel(Attribute label, double value)
Can be used to create a default model for regression tasks.

DefaultModel(Attribute label, double value, double[] confidences)
Can be used to create a default model for classification tasks (confidence values should not be null in this case).

Method Summary

void	performPrediction(ExampleSet exampleSet, Attribute predictedLabelAttribute) Iterates over all examples and applies the model to them.
void	readPredictionModelData(java.io.ObjectInputStream in) Reads the model data from the input stream.
java.lang.String	toString()
void	writePredictionModelData(java.io.ObjectOutputStream out) Writes the model data into the output stream.

Methods inherited from class edu.udo.cs.yale.operator.learner.PredictionModel

apply, createPredictedLabel, getLabel, readData, removePredictedLabel, setLabel, writeData

Methods inherited from class edu.udo.cs.yale.operator.AbstractModel

equals, getExtension, getFileDescription, readModel, readModel, save, setParameter, writeModel, writeModel

Methods inherited from class edu.udo.cs.yale.operator.ResultObjectAdapter

addAction, getActions, getName, getVisualisationComponent, toHTML, toResultString

Methods inherited from class edu.udo.cs.yale.operator.AbstractIOObject

copy, read, read, read, write, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface edu.udo.cs.yale.operator.ResultObject

getActions, getName, getVisualisationComponent, toResultString

Methods inherited from interface edu.udo.cs.yale.operator.IOObject

copy, write, write

Field Detail

value

private double value

The default prediction.

confidences

private double[] confidences

The confidence values for all predictions.

Constructor Detail

DefaultModel

public DefaultModel()

Creates a new default model after loading it from disk.

DefaultModel

public DefaultModel(Attribute label,
                    double value)

Can be used to create a default model for regression tasks.

DefaultModel

public DefaultModel(Attribute label,
                    double value,
                    double[] confidences)

Can be used to create a default model for classification tasks (confidence values should not be null in this case).

Method Detail

performPrediction

public void performPrediction(ExampleSet exampleSet,
                              Attribute predictedLabelAttribute)
                       throws OperatorException

Iterates over all examples and applies the model to them.

Specified by:

performPrediction in class PredictionModel

Throws:

OperatorException

readPredictionModelData

public void readPredictionModelData(java.io.ObjectInputStream in)
                             throws java.io.IOException

Reads the model data from the input stream.

Specified by:

readPredictionModelData in class PredictionModel

Throws:

java.io.IOException

writePredictionModelData

public void writePredictionModelData(java.io.ObjectOutputStream out)
                              throws java.io.IOException

Writes the model data into the output stream.

Specified by:

writePredictionModelData in class PredictionModel

Throws:

java.io.IOException

toString

public java.lang.String toString()

Overrides:

toString in class PredictionModel