de.lmu.ifi.dbs.elki.algorithm.itemsetmining.associationrules

Class AssociationRuleGeneration.PartialItemset

java.lang.Object

de.lmu.ifi.dbs.elki.algorithm.itemsetmining.Itemset

de.lmu.ifi.dbs.elki.algorithm.itemsetmining.associationrules.AssociationRuleGeneration.PartialItemset

All Implemented Interfaces:

java.lang.Comparable<Itemset>

Enclosing class:

AssociationRuleGeneration

protected static class AssociationRuleGeneration.PartialItemset
extends Itemset

Mutable scatch itemset for finding itemsets, based on SparseItemset. Do not use this for storage.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
int	begin Fake length and offset.
int[]	indices Scratch storage.
int	len Fake length and offset.

Constructor Summary

Constructors

Constructor and Description
PartialItemset(int[] indices) Constructor.

Method Summary

Modifier and Type	Method and Description
int	iter() Get an iterator over items, usually the position within an array.
int	iterAdvance(int iter) Advance the iterator to the next position.
int	iterDim(int iter) Item at the iterator position.
boolean	iterValid(int iter) Check if the iterator position is valid.
int	length() Itemset length.

Methods inherited from class de.lmu.ifi.dbs.elki.algorithm.itemsetmining.Itemset

appendItemsTo, appendTo, compareLexicographical, compareTo, containedIn, equals, getSupport, hashCode, increaseSupport, toBitset, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

len

public int len

Fake length and offset.

begin

public int begin

Fake length and offset.

indices

public int[] indices

Scratch storage.

Constructor Detail

PartialItemset

public PartialItemset(int[] indices)

Constructor.

Parameters:

indices - Indices

Method Detail

length

public int length()

Description copied from class: Itemset

Itemset length.

Specified by:

length in class Itemset

Returns:

Itemset length

iter

public int iter()

Description copied from class: Itemset

Get an iterator over items, usually the position within an array. Intended usage:

 
 for (int iter = v.iter(); v.iterValid(iter); iter = v.iterAdvance(iter)) {
   final int item = v.iterItem(iter);
   // Do something.
 }
 
 

Specified by:

iter in class Itemset

Returns:

Iterator

iterValid

public boolean iterValid(int iter)

Description copied from class: Itemset

Check if the iterator position is valid.

Specified by:

iterValid in class Itemset

Parameters:

iter - Iterator

Returns:

true if the position is valid.

iterAdvance

public int iterAdvance(int iter)

Description copied from class: Itemset

Advance the iterator to the next position.

Specified by:

iterAdvance in class Itemset

Parameters:

iter - Iterator

Returns:

New iterator position

iterDim

public int iterDim(int iter)

Description copied from class: Itemset

Item at the iterator position.

Specified by:

iterDim in class Itemset

Parameters:

iter - Iterator

Returns:

Current item