# Package org.encog.ml.data

- Interface Summary
  Interface | Description
  --- | ---
  MLComplexData | This class implements a data object that can hold complex numbers.
  MLData | Defines an array of data.
  MLDataPair | Training data is stored in two ways, depending on if the data is for supervised, or unsupervised training.
  MLDataSet | An interface designed to abstract classes that store machine learning data.
  MLSequenceSet | A sequence set is a collection of data sets.

- Exception Summary
  Exception | Description
  --- | ---
  MLDataError | Used by the machine learning methods classes to indicate a data error.

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