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

- Packages that use Classifier
  Package | Description
  --- | ---
  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
    Modifier and Type | Class and Description
    --- | ---
    `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
    Modifier and Type | Class and Description
    --- | ---
    `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
    Modifier and Type | Method and Description
    --- | ---
    `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.

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