org.apache.ctakes.ytex.kernel

Class InfoContentEvaluatorImpl

java.lang.Object

org.apache.ctakes.ytex.kernel.InfoContentEvaluatorImpl

All Implemented Interfaces:

InfoContentEvaluator

public class InfoContentEvaluatorImpl
extends Object
implements InfoContentEvaluator

Calculate the information content of each concept in a corpus wrt the specified concept graph. Required properties:

• org.apache.ctakes.ytex.conceptGraphName - required - name of conceptGraph. @see ConceptDao
• org.apache.ctakes.ytex.corpusName - required - name of corpus
• org.apache.ctakes.ytex.conceptSetName - optional - you may want to experiment with different sets of concepts from a corpus, e.g. concepts from certain sections, or different ways of counting concepts.
• org.apache.ctakes.ytex.freqQuery - query to obtain raw concept frequencies for the corpus

to execute, either specify these options via system properties (-D options) on the command line, or supply this class with the path to a properties file used for evaluation, or both (-D overrides properties file).

The information content of each concept is stored in the feature_rank table. The related record in the feature_eval table has

• type = infocontent
• feature_set_name = conceptSetName
• param1 = conceptGraphName

Author:

vijay

Field Summary

Fields inherited from interface org.apache.ctakes.ytex.kernel.InfoContentEvaluator

INFOCONTENT

Constructor Summary

Constructors

Constructor and Description
InfoContentEvaluatorImpl()

Method Summary

Modifier and Type	Method and Description
void	evaluateCorpusInfoContent(String freqQuery, String corpusName, String conceptGraphName, String conceptSetName) calculate information content for all concepts
ClassifierEvaluationDao	getClassifierEvaluationDao()
ConceptDao	getConceptDao()
DataSource	getDataSource(DataSource ds)
Map<String,Double>	getFrequencies(String freqQuery) get the frequency of each term in the corpus.
static void	main(String[] args)
void	setClassifierEvaluationDao(ClassifierEvaluationDao classifierEvaluationDao)
void	setConceptDao(ConceptDao conceptDao)
void	setDataSource(DataSource ds)

Methods inherited from class java.lang.Object

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

Constructor Detail

InfoContentEvaluatorImpl

public InfoContentEvaluatorImpl()

Method Detail

main

public static void main(String[] args)
                 throws IOException

Parameters:

args -

Throws:

IOException

evaluateCorpusInfoContent

public void evaluateCorpusInfoContent(String freqQuery,
                                      String corpusName,
                                      String conceptGraphName,
                                      String conceptSetName)

Description copied from interface: InfoContentEvaluator

calculate information content for all concepts

Specified by:

evaluateCorpusInfoContent in interface InfoContentEvaluator

getClassifierEvaluationDao

public ClassifierEvaluationDao getClassifierEvaluationDao()

getConceptDao

public ConceptDao getConceptDao()

getDataSource

public DataSource getDataSource(DataSource ds)

getFrequencies

public Map<String,Double> getFrequencies(String freqQuery)

get the frequency of each term in the corpus.

Specified by:

getFrequencies in interface InfoContentEvaluator

Parameters:

freqQuery - query returns 2 columns. 1st column - concept id (string), 2nd column - frequency (double)

Returns:

setClassifierEvaluationDao

public void setClassifierEvaluationDao(ClassifierEvaluationDao classifierEvaluationDao)

setConceptDao

public void setConceptDao(ConceptDao conceptDao)

setDataSource

public void setDataSource(DataSource ds)