lemur::langmod::OneStepMarkovChain Class Reference

One step markov chain translation model, not fully tested yet. More...

#include <OneStepMarkovChain.hpp>

List of all members.

Public Member Functions
	OneStepMarkovChain (const lemur::utility::WeightedIDSet &docSet, const lemur::api::Index &homeIndex, double *wdNorm, double stopProbAlpha)
	construct a MC restricted to a subset of docs
	~OneStepMarkovChain ()
Iteration support
void	startFromWordIteration (lemur::api::TERMID_T toWord) const
	Start iteration over w's for t(toWord |w).
bool	hasMoreFromWord () const
void	nextFromWordProb (lemur::api::TERMID_T &fromWord, double &prob) const
	Fetch the next word and the prob of "translating" it to the toWord.
Private Member Functions
void	computeFromWordProb (lemur::api::TERMID_T toWord) const
Private Attributes
const lemur::api::Index &	ind
double	alpha
int *	dSet
double *	norm
double *	fromWordPr
lemur::api::TERMID_T	itPos
lemur::api::TERMID_T	curToWord

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Detailed Description

One step markov chain translation model, not fully tested yet.

This code is included mainly to illustrate how the toolkit can be used for estimating such models.

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Constructor & Destructor Documentation

lemur::langmod::OneStepMarkovChain::OneStepMarkovChain (  const lemur::utility::WeightedIDSet &  docSet, const lemur::api::Index &  homeIndex, double *  wdNorm, double  stopProbAlpha )

construct a MC restricted to a subset of docs

lemur::langmod::OneStepMarkovChain::~OneStepMarkovChain (   )

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Member Function Documentation

void lemur::langmod::OneStepMarkovChain::computeFromWordProb (  lemur::api::TERMID_T  toWord  )  const [private]

bool lemur::langmod::OneStepMarkovChain::hasMoreFromWord (   )  const [inline]

void lemur::langmod::OneStepMarkovChain::nextFromWordProb (  lemur::api::TERMID_T &  fromWord, double &  prob )  const

Fetch the next word and the prob of "translating" it to the toWord.

void lemur::langmod::OneStepMarkovChain::startFromWordIteration (  lemur::api::TERMID_T  toWord  )  const

Start iteration over w's for t(toWord |w). Given a word, this provides a way to access the translation probability from any word to this word. E.g., given w, each iteration would give us t(w|w1), t(w|w2), ..., t(w|w_n).

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Member Data Documentation

double lemur::langmod::OneStepMarkovChain::alpha [private]

lemur::api::TERMID_T lemur::langmod::OneStepMarkovChain::curToWord [mutable, private]

int* lemur::langmod::OneStepMarkovChain::dSet [private]

double* lemur::langmod::OneStepMarkovChain::fromWordPr [mutable, private]

const lemur::api::Index& lemur::langmod::OneStepMarkovChain::ind [private]

lemur::api::TERMID_T lemur::langmod::OneStepMarkovChain::itPos [mutable, private]

double* lemur::langmod::OneStepMarkovChain::norm [private]

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The documentation for this class was generated from the following files:

• OneStepMarkovChain.hpp
• OneStepMarkovChain.cpp

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