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

Class OneItemset

java.lang.Object

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

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

All Implemented Interfaces:

Comparable<Itemset>

public class OneItemset
extends Itemset

APRIORI itemset.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	item Trivial item.

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

support

Constructor Summary

Constructors

Constructor and Description
OneItemset(int item) Constructor of 1-itemset.
OneItemset(int item, int support) Constructor with initial support.

Method Summary

Methods

Modifier and Type	Method and Description
StringBuilder	appendTo(StringBuilder buf, VectorFieldTypeInformation<BitVector> meta) Append to a string buffer.
int	compareTo(Itemset o)
boolean	containedIn(BitVector bv) Test whether the itemset is contained in a bit vector.
boolean	equals(Object obj)
long[]	getItems() Get the items.
int	hashCode()
int	length() Itemset length.

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

getSupport, increaseSupport, toString

Methods inherited from class java.lang.Object

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

Field Detail

item

int item

Trivial item.

Constructor Detail

OneItemset

public OneItemset(int item)

Constructor of 1-itemset.

Parameters:

item - Item

OneItemset

public OneItemset(int item,
          int support)

Constructor with initial support.

Parameters:

item - Item

support - Support

Method Detail

length

public int length()

Description copied from class: Itemset

Itemset length.

Specified by:

length in class Itemset

Returns:

Itemset length

containedIn

public boolean containedIn(BitVector bv)

Description copied from class: Itemset

Test whether the itemset is contained in a bit vector.

Specified by:

containedIn in class Itemset

Parameters:

bv - Bit vector

Returns:

true when the itemset is contained in this vector.

getItems

public long[] getItems()

Description copied from class: Itemset

Get the items.

Specified by:

getItems in class Itemset

Returns:

Itemset contents.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

compareTo

public int compareTo(Itemset o)

appendTo

public StringBuilder appendTo(StringBuilder buf,
                     VectorFieldTypeInformation<BitVector> meta)

Description copied from class: Itemset

Append to a string buffer.

Specified by:

appendTo in class Itemset

Parameters:

buf - Buffer

meta - Relation metadata (for labels)

Returns:

String buffer for chaining.