meka.core

Class CCUtils

java.lang.Object

meka.core.CCUtils

public abstract class CCUtils
extends 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

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

clone, equals, finalize, 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 Exception

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

Throws:

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