ivory.core.data.stat

Interface CfTable

All Known Implementing Classes:

CfTableArray

public interface CfTable

Interface to object that keeps track of the collection frequency of each term in the collection. Concrete classes may vary in terms of implementation, e.g., hashes (faster lookup, but less memory efficient) or arrays (slower binary search lookup, but more memory efficient).

Author:

Jimmy Lin

Method Summary

Methods

Modifier and Type	Method and Description
long	getCf(int term) Returns the collection frequency of a term.
long	getCollectionSize() Returns the total number of terms in this collection.
long	getMaxCf() Returns the collection frequency of the term with the highest collection frequency.
int	getMaxCfTerm() Returns the term with the highest collection frequency.
int	getNumOfSingletonTerms() Returns the number of terms that only appear once in the collection.
int	getVocabularySize() Returns the number of unique terms in the collection.

Method Detail

getCf

long getCf(int term)

Returns the collection frequency of a term.

getCollectionSize

long getCollectionSize()

Returns the total number of terms in this collection.

getMaxCf

long getMaxCf()

Returns the collection frequency of the term with the highest collection frequency.

getMaxCfTerm

int getMaxCfTerm()

Returns the term with the highest collection frequency.

getNumOfSingletonTerms

int getNumOfSingletonTerms()

Returns the number of terms that only appear once in the collection.

getVocabularySize

int getVocabularySize()

Returns the number of unique terms in the collection.