Class CrossValidationPartitioner<E>

Namespace

NOpenNLP.Tools.Util.Eval

Assembly

NOpenNLP.Tools.dll

Provides access to training and test partitions for n-fold cross validation.

Cross validation is used to evaluate the performance of a classifier when only training data is available. The training set is split into n parts and the training / evaluation is performed n times on these parts. The training partition always consists of n -1 parts and one part is used for testing.

To use the CrossValidationPartitioner<E> a client iterates over the n CrossValidationPartitioner<E>.TrainingSampleStreams. Each CrossValidationPartitioner<E>.TrainingSampleStream represents one partition and is used first for training and afterwards for testing. The TestSampleStream can be obtained from the CrossValidationPartitioner<E>.TrainingSampleStream with the GetTestSampleStream() method.

public class CrossValidationPartitioner<E> where E : class

Type Parameters

E

Inheritance

object

CrossValidationPartitioner<E>

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Constructors

CrossValidationPartitioner(IObjectStream<E?>, int)

Initializes the current instance.

public CrossValidationPartitioner(IObjectStream<E?> inElements, int numberOfPartitions)

Parameters

inElements IObjectStream<E>

numberOfPartitions int

CrossValidationPartitioner(ICollection<E>, int)

Initializes the current instance.

public CrossValidationPartitioner(ICollection<E> elements, int numberOfPartitions)

Parameters

elements ICollection<E>

numberOfPartitions int

Properties

HasNext

Checks if there are more partitions available.

public bool HasNext { get; }

Property Value

bool

Methods

Next()

Retrieves the next training and test partitions.

public CrossValidationPartitioner<E>.TrainingSampleStream Next()

Returns

CrossValidationPartitioner<E>.TrainingSampleStream

Exceptions

IOException

if there is an error during resetting the stream

ToString()

Returns a string that represents the current object.

public override string ToString()

Returns

string

A string that represents the current object.