Class NGramFeatureGenerator

Namespace

NOpenNLP.Tools.Doccat

Assembly

NOpenNLP.Tools.dll

Generates ngram features for a document. n-gram IFeatureGenerator

public class NGramFeatureGenerator : IFeatureGenerator

Inheritance

object

NGramFeatureGenerator

Implements

IFeatureGenerator

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Constructors

NGramFeatureGenerator()

Default constructor for Bi grams

public NGramFeatureGenerator()

NGramFeatureGenerator(int, int)

Constructor for ngrams.

public NGramFeatureGenerator(int minGram, int maxGram)

Parameters

minGram int

minGram value - which means minimum words in ngram features

maxGram int

maxGram value - which means maximum words in ngram features

Exceptions

InvalidFormatException

Methods

ExtractFeatures(string[], IDictionary<string, object>)

Extract ngram features from given text fragments

public virtual ICollection<string> ExtractFeatures(string[] text, IDictionary<string, object> extraInfo)

Parameters

text string[]

the text fragments to extract features from

extraInfo IDictionary<string, object>

optional extra information

Returns

ICollection<string>

a collection of n gram features