dragon.ir.classification.multiclass

Class LossMultiClassDecoder

java.lang.Object

dragon.ir.classification.multiclass.LossMultiClassDecoder

All Implemented Interfaces:

MultiClassDecoder, Serializable

public class LossMultiClassDecoder
extends Object
implements MultiClassDecoder, Serializable

Loss-based Multi-class Decoder

A multi-class decoder which predict the category of an example by minimizing the loss. More details can be found in the following paper:
Allwein, E.L., Schapire, R.E., and Singer, Y., "Reducing multiclass to binary: A unifying approach for margin classifiers," Journal of Machine Learning Research, 1:113:C141, 2000.

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LossMultiClassDecoder(LossFunction lossFunc)

Method Summary

Modifier and Type	Method and Description
int	decode(CodeMatrix matrix, double[] binClassifierResults) Predicts the label of the example given the code matrix and the results of all binary classifiers
int[]	rank() Rank all class labels

Methods inherited from class java.lang.Object

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

Constructor Detail

LossMultiClassDecoder

public LossMultiClassDecoder(LossFunction lossFunc)

Method Detail

decode

public int decode(CodeMatrix matrix,
                  double[] binClassifierResults)

Description copied from interface: MultiClassDecoder

Predicts the label of the example given the code matrix and the results of all binary classifiers

Specified by:

decode in interface MultiClassDecoder

Parameters:

matrix - the code matrix which describes the relationship between binary classifiers and categories

binClassifierResults - the predictions of all binary classifiers

Returns:

the category the example should be associated with

rank

public int[] rank()

Description copied from interface: MultiClassDecoder

Rank all class labels

Specified by:

rank in interface MultiClassDecoder

Returns:

the ranking of class labels. The first and last element of the returned array contain the most possible label and the least possible label, respectively.