Package org.apache.lucene.classification.utils

Class ConfusionMatrixGenerator

java.lang.Object

org.apache.lucene.classification.utils.ConfusionMatrixGenerator

public class ConfusionMatrixGenerator
extends Object

Utility class to generate the confusion matrix of a Classifier

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ConfusionMatrixGenerator.ConfusionMatrix	a confusion matrix, backed by a Map representing the linearized matrix

Method Summary

Modifier and Type	Method	Description
static <T> ConfusionMatrixGenerator.ConfusionMatrix	getConfusionMatrix(IndexReader reader, Classifier<T> classifier, String classFieldName, String textFieldName, long timeoutMilliseconds)	get the ConfusionMatrixGenerator.ConfusionMatrix of a given Classifier, generated on the given IndexReader, class and text fields.

Methods inherited from class java.lang.Object

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

Method Details

getConfusionMatrix

public static <T>
ConfusionMatrixGenerator.ConfusionMatrix getConfusionMatrix(IndexReader reader,
 Classifier<T> classifier,
 String classFieldName,
 String textFieldName,
 long timeoutMilliseconds)
                                                     throws IOException

get the ConfusionMatrixGenerator.ConfusionMatrix of a given Classifier, generated on the given IndexReader, class and text fields.

Type Parameters:

T - the return type of the ClassificationResult returned by the given Classifier

Parameters:

reader - the IndexReader containing the index used for creating the Classifier

classifier - the Classifier whose confusion matrix has to be generated

classFieldName - the name of the Lucene field used as the classifier's output

textFieldName - the nome the Lucene field used as the classifier's input

timeoutMilliseconds - timeout to wait before stopping creating the confusion matrix

Returns:

a ConfusionMatrixGenerator.ConfusionMatrix

Throws:

IOException - if problems occurr while reading the index or using the classifier