edu.berkeley.nlp.lm

Interface ArrayEncodedNgramLanguageModel<W>

All Superinterfaces:

NgramLanguageModel<W>

All Known Implementing Classes:

AbstractArrayEncodedNgramLanguageModel, ArrayEncodedCachingLmWrapper, ArrayEncodedProbBackoffLm, KneserNeyLmReaderCallback, StupidBackoffLm

public interface ArrayEncodedNgramLanguageModel<W>
extends NgramLanguageModel<W>

Top-level interface for an n-gram language model which accepts n-gram in an array-of-integers encoding. The integers represent words of type W in the vocabulary, and the mapping from the vocabulary to integers is managed by an instance of the WordIndexer class.

Author:

adampauls

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ArrayEncodedNgramLanguageModel.DefaultImplementations

Nested classes/interfaces inherited from interface edu.berkeley.nlp.lm.NgramLanguageModel

NgramLanguageModel.StaticMethods

Method Summary

Modifier and Type	Method and Description
float	getLogProb(int[] ngram) Equivalent to getLogProb(ngram, 0, ngram.length)
float	getLogProb(int[] ngram, int startPos, int endPos) Calculate language model score of an n-gram.

Methods inherited from interface edu.berkeley.nlp.lm.NgramLanguageModel

getLmOrder, getLogProb, getWordIndexer, scoreSentence, setOovWordLogProb

Method Detail

getLogProb

float getLogProb(int[] ngram,
                 int startPos,
                 int endPos)

Calculate language model score of an n-gram. Warning: if you pass in an n-gram of length greater than getLmOrder(), this call will silently ignore the extra words of context. In other words, if you pass in a 5-gram (endPos-startPos == 5) to a 3-gram model, it will only score the words from startPos + 2 to endPos.

Parameters:

ngram - array of words in integer representation

startPos - start of the portion of the array to be read

endPos - end of the portion of the array to be read.

Returns:

getLogProb

float getLogProb(int[] ngram)

Equivalent to getLogProb(ngram, 0, ngram.length)

See Also:

getLogProb(int[], int, int)