org.openimaj.pgm.vb.lda.mle

Class LDAVariationlState

java.lang.Object

org.openimaj.pgm.vb.lda.mle.LDAVariationlState

public class LDAVariationlState
extends Object

The state of the E step of the MLE LDA

Author:

Sina Samangooei (ss@ecs.soton.ac.uk)

Field Summary

Fields

Modifier and Type	Field and Description
double[]	digamma Holds the first derivative of the gamma
double	likelihood The liklihood of the current topic sufficient statistics and variational parameters
double	oldLikelihood The old liklihood
double[]	oldphi Useful for calculating the sumphi for a given document
double[][]	phi the n'th unique word in a document's probability for each topic
LDAModel	state The current LDAModel (i.e.
double[]	varGamma the dirichlet parameter for the topic multinomials

Constructor Summary

Constructors

Constructor and Description
LDAVariationlState(LDAModel state) The variational state holds phi and gamma states as well as information for convergence of the E step.

Method Summary

Modifier and Type	Method and Description
void	prepare(Document doc) initialises the phi and sets everything to 0

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

phi

public double[][] phi

the n'th unique word in a document's probability for each topic

oldphi

public double[] oldphi

Useful for calculating the sumphi for a given document

varGamma

public double[] varGamma

the dirichlet parameter for the topic multinomials

likelihood

public double likelihood

The liklihood of the current topic sufficient statistics and variational parameters

oldLikelihood

public double oldLikelihood

The old liklihood

state

public LDAModel state

The current LDAModel (i.e. the current sufficient statistics

digamma

public double[] digamma

Holds the first derivative of the gamma

Constructor Detail

LDAVariationlState

public LDAVariationlState(LDAModel state)

The variational state holds phi and gamma states as well as information for convergence of the E step.

Parameters:

state -

Method Detail

prepare

public void prepare(Document doc)

initialises the phi and sets everything to 0

Parameters:

doc -