PlsaMap Class Reference

Compute the PLSA decomposition. More...

#include <PlsaMap.h>

Inheritance diagram for PlsaMap:

List of all members.

Public Member Functions
	PlsaMap (int documents, int words, int topics)
	Initialise the class with the known document, word and topic counts.
void	printEigenValues (void)
	Print the topic probabilities to the screen.
void	deleteTempBuffers (void)
	Clean up by deleting the temporary storage.
void	initialise (WordSubIndex *index)
	Gather statistics of the SubIndex.
void	zeroTempBuffers (void)
	Initialise the temporary storage.
void	randomiseRealBuffers (WordSubIndex *index)
	Randomise the probability storage.
void	initialiseRealBuffers (WordSubIndex *index)
	Alternative to random initialisation.
void	iterate (void)
	Perform one iteration of PLSA using the virtual functions.
void	iterate (int **index)
	Perform one iteration of PLSA using the provided matrix.
void	finalise (void)
	Finish iterations.
void	printFile (void)
	Write the probabilities to "compare.bin".
void	checkProbabilities (void)
	Check that the probabilities add to 1.
void	operator+= (PlsaMap *x)
	Add the results from another PlsaMap.
virtual void	nextElement (void)=0
	Move to the next element in the matrix.
virtual void	reset (void)=0
	Mov to the beginning of the matrix.
virtual int	term (void)=0
	Return the current term.
virtual int	document (void)=0
	Return the current document.
virtual float	frequency (void)=0
	Return the current matrix value.
Public Attributes
float **	Pwz
	The probability of a word given a topic.
float **	Pdz
	The probability of a document given a topic.
float *	Pz
	The probability of a topic.
float	_R
	The number of words in the corpus (used to compute probabilities).
const int	topics
	The number of topics.

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Detailed Description

Compute the PLSA decomposition.

This class provides the methods compute the Probabilisitic Latent Semantic Analysis from the provided document index. The data is accessed through the virtual functions provided.

Author

lapark

Revision

1.7.2.2

Date

2009/11/05 01:46:39

Id

PlsaMap.h,v 1.7.2.2 2009/11/05 01:46:39 lapark Exp

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

• src/PlsaMap.h
• src/PlsaMap.cc