cc.mallet.topics

Class NPTopicModel

java.lang.Object

cc.mallet.topics.NPTopicModel

All Implemented Interfaces:

java.io.Serializable

public class NPTopicModel
extends java.lang.Object
implements java.io.Serializable

A non-parametric topic model that uses the "minimal path" assumption to reduce bookkeeping.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static double	DEFAULT_BETA
int	showTopicsInterval
int	wordsPerTopic

Constructor Summary

Constructors

Constructor and Description
NPTopicModel(double alpha, double gamma, double beta)

Method Summary

Modifier and Type	Method and Description
void	addInstances(InstanceList training, int initialTopics)
static void	main(java.lang.String[] args)
void	printState(java.io.File f)
void	printState(java.io.PrintStream out)
void	sample(int iterations)
void	setRandomSeed(int seed)
void	setTopicDisplay(int interval, int n)
java.lang.String	topWords(int numWords)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BETA

public static final double DEFAULT_BETA

See Also:

Constant Field Values

showTopicsInterval

public int showTopicsInterval

wordsPerTopic

public int wordsPerTopic

Constructor Detail

NPTopicModel

public NPTopicModel(double alpha,
                    double gamma,
                    double beta)

Parameters:

alpha - this parameter balances the local document topic counts with the global distribution over topics.

gamma - this parameter is the weight on a completely new, never-before-seen topic in the global distribution.

beta - this parameter controls the variability of the topic-word distributions

Method Detail

setTopicDisplay

public void setTopicDisplay(int interval,
                            int n)

setRandomSeed

public void setRandomSeed(int seed)

addInstances

public void addInstances(InstanceList training,
                         int initialTopics)

sample

public void sample(int iterations)
            throws java.io.IOException

Throws:

java.io.IOException

topWords

public java.lang.String topWords(int numWords)

printState

public void printState(java.io.File f)
                throws java.io.IOException

Throws:

java.io.IOException

printState

public void printState(java.io.PrintStream out)

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException