meka.core

Class CCUtils

java.lang.Object

meka.core.CCUtils

public abstract class CCUtils
extends java.lang.Object

CCUtils.java - Handy Utils for working with Classifier Chains (and Trees and Graphs)

Version:

June 2014

Author:

Jesse Read

Constructor Summary

Constructors

Constructor and Description
CCUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static CC	buildCC(int[] chain, weka.core.Instances D, weka.classifiers.Classifier g) BuildCC - Given a base classifier 'g', build a new CC classifier on data D, given chain order 'chain'.
static weka.core.Instances	linkTransform(weka.core.Instances D, int j, int[] exl) LinkTransform - prepare 'D' for training at a node 'j' of the chain, by excluding 'exl'.
static weka.core.Instance	linkTransformation(weka.core.Instance x, int[] excl, weka.core.Instances _D) LinkTransform - prepare 'x' for testing at a node 'j' of the chain, by excluding 'exl'.
static void	setPath(weka.core.Instance xy, double[] path) SetPath - set 'path[]' into the first L attributes of Instance 'xy'.

Methods inherited from class java.lang.Object

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

Constructor Detail

CCUtils

public CCUtils()

Method Detail

buildCC

public static CC buildCC(int[] chain,
         weka.core.Instances D,
         weka.classifiers.Classifier g)
                  throws java.lang.Exception

BuildCC - Given a base classifier 'g', build a new CC classifier on data D, given chain order 'chain'.

Throws:

java.lang.Exception

setPath

public static void setPath(weka.core.Instance xy,
           double[] path)

SetPath - set 'path[]' into the first L attributes of Instance 'xy'.

Parameters:

xy - an Example (x,y)

path - a label vector

linkTransform

public static weka.core.Instances linkTransform(weka.core.Instances D,
                                int j,
                                int[] exl)

LinkTransform - prepare 'D' for training at a node 'j' of the chain, by excluding 'exl'.

Parameters:

D - dataset

j - index of the label of this node

exl - indices of labels which are NOT parents of j

Returns:

the transformed dataset (which can be used as a template)

linkTransformation

public static weka.core.Instance linkTransformation(weka.core.Instance x,
                                    int[] excl,
                                    weka.core.Instances _D)

LinkTransform - prepare 'x' for testing at a node 'j' of the chain, by excluding 'exl'.

Parameters:

x - instance

excl - indices of labels which are NOT parents of j

_D - the dataset template to use

Returns:

the transformed instance