## Uses of Interface
org.apache.lucene.classification.Classifier

Packages that use Classifier
org.apache.lucene.classification: Uses already seen data (the indexed documents) to classify an input ( can be simple text or a structured document).
org.apache.lucene.classification.document: Uses already seen data (the indexed documents) to classify new documents.
org.apache.lucene.classification.utils: Utilities for evaluation, data preparation, etc.

### Uses of Classifier in org.apache.lucene.classification

Classes in org.apache.lucene.classification that implement Classifier
`class` `BM25NBClassifier` A classifier approximating naive bayes classifier by using pure queries on BM25.
`class` `BooleanPerceptronClassifier` A perceptron (see `http://en.wikipedia.org/wiki/Perceptron`) based `Boolean` `Classifier`.
`class` `CachingNaiveBayesClassifier` A simplistic Lucene based NaiveBayes classifier, with caching feature, see `http://en.wikipedia.org/wiki/Naive_Bayes_classifier`
`class` `KNearestFuzzyClassifier` A k-Nearest Neighbor classifier based on `NearestFuzzyQuery`.
`class` `KNearestNeighborClassifier` A k-Nearest Neighbor classifier (see `http://en.wikipedia.org/wiki/K-nearest_neighbors`) based on `MoreLikeThis`
`class` `SimpleNaiveBayesClassifier` A simplistic Lucene based NaiveBayes classifier, see `http://en.wikipedia.org/wiki/Naive_Bayes_classifier`

### Uses of Classifier in org.apache.lucene.classification.document

Classes in org.apache.lucene.classification.document that implement Classifier
`class` `KNearestNeighborDocumentClassifier` A k-Nearest Neighbor Document classifier (see `http://en.wikipedia.org/wiki/K-nearest_neighbors`) based on `MoreLikeThis` .
`class` `SimpleNaiveBayesDocumentClassifier` A simplistic Lucene based NaiveBayes classifier, see `http://en.wikipedia.org/wiki/Naive_Bayes_classifier`

### Uses of Classifier in org.apache.lucene.classification.utils

Methods in org.apache.lucene.classification.utils with parameters of type Classifier
`static <T> ConfusionMatrixGenerator.ConfusionMatrix` ConfusionMatrixGenerator.`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.