magpie.attributes.evaluators

Class AreaUnderROCEvaluator

java.lang.Object

magpie.attributes.evaluators.BaseAttributeEvaluator

magpie.attributes.evaluators.AreaUnderROCEvaluator

All Implemented Interfaces:

Options

public class AreaUnderROCEvaluator
extends BaseAttributeEvaluator

Ranks entries based on the area under the Receiver Operating Characteristic Curve. This measure is best used when testing the ability of attributes to partition data between two different classes. In the event that more than one class is present, it will report the ability to distinguish whether an entry is a certain, user-specified class.

Usage: [<class>]
class: Name of class for which the ability to distinguish is being assessed (default: class #0)

Constructor Summary

Constructors

Constructor and Description
AreaUnderROCEvaluator()

Method Summary

Modifier and Type	Method and Description
protected java.util.Comparator<java.lang.Double>	compare() Create a comparator that will sort entries from the best to worst
protected double[]	evaluateAttributes_internal(Dataset Data) Operation that actually performs the work of evaluating attributes.
java.lang.String	printUsage() Print out required format for options.
void	setOptions(java.util.List<java.lang.Object> Options) Set any options for this object.
void	setTargetClass(java.lang.String className) Define the class for which the ability to classify is being assessed.

Methods inherited from class magpie.attributes.evaluators.BaseAttributeEvaluator

evaluateAttributes, getAttributeRanks, printRankings

Methods inherited from class java.lang.Object

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

Constructor Detail

AreaUnderROCEvaluator

public AreaUnderROCEvaluator()

Method Detail

setOptions

public void setOptions(java.util.List<java.lang.Object> Options)
                throws java.lang.Exception

Description copied from interface: Options

Set any options for this object. If parsing the options fails, return an Exception with the usage as its message.

Parameters:

Options - Array of options as Objects - can be null

Throws:

java.lang.Exception - if problem with inputs

printUsage

public java.lang.String printUsage()

Description copied from interface: Options

Print out required format for options. For consistency, should start with "Usage: ".

Returns:

Usage for this function

setTargetClass

public void setTargetClass(java.lang.String className)

Define the class for which the ability to classify is being assessed.

Parameters:

className - Name of class

compare

protected java.util.Comparator<java.lang.Double> compare()

Description copied from class: BaseAttributeEvaluator

Create a comparator that will sort entries from the best to worst

Specified by:

compare in class BaseAttributeEvaluator

Returns:

Whether the predictive power of an attribute increases with increasing parameter

evaluateAttributes_internal

protected double[] evaluateAttributes_internal(Dataset Data)

Description copied from class: BaseAttributeEvaluator

Operation that actually performs the work of evaluating attributes.

Specified by:

evaluateAttributes_internal in class BaseAttributeEvaluator

Parameters:

Data - Dataset used to evaluate attributes

Returns:

Predictive power of each attribute.