keystoneml.nodes.nlp

BackoffIndexer

trait BackoffIndexer[WordType, NGramType] extends NGramIndexer[WordType, NGramType]

A family of NGramIndexer that can unpack or strip off specific words, query the order of an packed ngram, etc.

Such indexers are useful for LMs that require backoff contexts (e.g. Stupid Backoff, KN).

Linear Supertypes
NGramIndexer[WordType, NGramType], Serializable, Serializable, AnyRef, Any
Known Subclasses
NGramIndexerImpl, NaiveBitPackIndexer
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Inherited
  1. BackoffIndexer
  2. NGramIndexer
  3. Serializable
  4. Serializable
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Abstract Value Members

  1. abstract val maxNgramOrder: Int

    Definition Classes
    NGramIndexer

  2. abstract val minNgramOrder: Int

    Definition Classes
    NGramIndexer

  3. abstract def ngramOrder(ngram: NGramType): Int

    Returns an order in [minNgramOrder, maxNgramOrder] if valid; otherwise errors out.

  4. abstract def pack(ngram: Seq[WordType]): NGramType

    Packs a sequence of words of type WordType into a single NGramType.

    Packs a sequence of words of type WordType into a single NGramType. The current word is ngram.last, and the words before are the context.

    Definition Classes
    NGramIndexer

  5. abstract def removeCurrentWord(ngram: NGramType): NGramType

  6. abstract def removeFarthestWord(ngram: NGramType): NGramType

  7. abstract def unpack(ngram: NGramType, pos: Int): WordType

    Unpacks the pos word out of the packed ngram of type NGramType.

    Unpacks the pos word out of the packed ngram of type NGramType. Position 0 indicates the farthest context (if unigram, the current word), and position MAX_ORDER-1 represents the current word.

    Useful for getting words at special positions (e.g. first two in context).

Concrete Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any

  3. final def ##(): Int

    Definition Classes
    AnyRef → Any

  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any

  6. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  7. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  8. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  9. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  10. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  11. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any

  12. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  14. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  15. final def notify(): Unit

    Definition Classes
    AnyRef

  16. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  17. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef

  18. def toString(): String

    Definition Classes
    AnyRef → Any

  19. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  20. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  21. final def wait(arg0: Long): Unit

    Definition Classes
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    Annotations
    @throws( ... )

Inherited from NGramIndexer[WordType, NGramType]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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