# Package org.apache.lucene.classification.utils

package org.apache.lucene.classification.utils
Utilities for evaluation, data preparation, etc.

- Related Packages
  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.
- Classes
  Class
  Description
  ConfusionMatrixGenerator
  Utility class to generate the confusion matrix of a `Classifier`
  ConfusionMatrixGenerator.ConfusionMatrix
  a confusion matrix, backed by a `Map` representing the linearized matrix
  DatasetSplitter
  Utility class for creating training / test / cross validation indexes from the original index.
  DocToDoubleVectorUtils
  utility class for converting Lucene `Document`s to `Double` vectors.
  NearestFuzzyQuery
  Simplification of FuzzyLikeThisQuery, to be used in the context of KNN classification.