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

Class Itemset

java.lang.Object

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

All Implemented Interfaces:

Comparable<Itemset>

Direct Known Subclasses:

DenseItemset, OneItemset, SmallDenseItemset, SparseItemset

public abstract class Itemset
extends Object
implements Comparable<Itemset>

APRIORI itemset.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	support Support for this itemset.

Constructor Summary

Constructors

Constructor and Description
Itemset()

Method Summary

Methods

Modifier and Type	Method and Description
abstract StringBuilder	appendTo(StringBuilder buf, VectorFieldTypeInformation<BitVector> meta) Append to a string buffer.
abstract boolean	containedIn(BitVector bv) Test whether the itemset is contained in a bit vector.
abstract long[]	getItems() Get the items.
int	getSupport() Get item support.
int	increaseSupport() Increase the support of the itemset.
abstract int	length() Itemset length.
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Comparable

compareTo

Field Detail

support

int support

Support for this itemset.

Constructor Detail

Itemset

public Itemset()

Method Detail

increaseSupport

public int increaseSupport()

Increase the support of the itemset.

Returns:

New support.

getSupport

public int getSupport()

Get item support.

Returns:

Support

containedIn

public abstract boolean containedIn(BitVector bv)

Test whether the itemset is contained in a bit vector.

Parameters:

bv - Bit vector

Returns:

true when the itemset is contained in this vector.

length

public abstract int length()

Itemset length.

Returns:

Itemset length

getItems

public abstract long[] getItems()

Get the items.

Returns:

Itemset contents.

toString

public String toString()

Overrides:

toString in class Object

appendTo

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

Append to a string buffer.

Parameters:

buf - Buffer

meta - Relation metadata (for labels)

Returns:

String buffer for chaining.