de.lmu.ifi.dbs.elki.evaluation.clustering.pairsegments

Class Segment

java.lang.Object

de.lmu.ifi.dbs.elki.evaluation.clustering.pairsegments.Segment

All Implemented Interfaces:

Comparable<Segment>

public class Segment
extends Object
implements Comparable<Segment>

A segment represents a set of pairs that share the same clustering properties. As such, for each ring (= clustering), a cluster number (or the constant UNCLUSTERED) is stored.

Field Summary

Fields

Modifier and Type	Field and Description
protected int[]	clusterIds The cluster numbers in each ring
protected DBIDs	objIDs IDs in segment, for object segments.
protected long	pairsize Size of cluster, in pairs.
static int	UNCLUSTERED Object is not clustered

Constructor Summary

Constructors

Constructor and Description
Segment(int clusterings)
Segment(int[] clone) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(Segment sid)
boolean	equals(Object obj)
int	get(int idx) Get cluster number for index idx.
DBIDs	getDBIDs() Get the DBIDs of objects contained in this segment.
long	getPairCount()
int	getUnpairedClusteringIndex() Returns the index of the first clustering having an unpaired cluster, or -1 no unpaired cluster exists.
int	hashCode()
boolean	isNone() Check if this segment contains the pairs that are never clustered by any of the clusterings (all 0).
boolean	isUnpaired() Checks if the segment has a cluster with unpaired objects.

Methods inherited from class java.lang.Object

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

Field Detail

UNCLUSTERED

public static final int UNCLUSTERED

Object is not clustered

See Also:

Constant Field Values

objIDs

protected DBIDs objIDs

IDs in segment, for object segments.

pairsize

protected long pairsize

Size of cluster, in pairs.

clusterIds

protected int[] clusterIds

The cluster numbers in each ring

Constructor Detail

Segment

public Segment(int clusterings)

Segment

public Segment(int[] clone)

Constructor.

Parameters:

clone - Clone of cluster ids

Method Detail

getPairCount

public long getPairCount()

get

public int get(int idx)

Get cluster number for index idx.

Parameters:

idx - Index

Returns:

Cluster number

isUnpaired

public boolean isUnpaired()

Checks if the segment has a cluster with unpaired objects. Unpaired clusters are represented by "0" (0 = all).

Returns:

true when unclustered in at least one dimension.

isNone

public boolean isNone()

Check if this segment contains the pairs that are never clustered by any of the clusterings (all 0).

Returns:

true when unclustered everywhere

getUnpairedClusteringIndex

public int getUnpairedClusteringIndex()

Returns the index of the first clustering having an unpaired cluster, or -1 no unpaired cluster exists.

Returns:

clustering id or -1

getDBIDs

public DBIDs getDBIDs()

Get the DBIDs of objects contained in this segment.

Returns:

the segment IDs

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

compareTo

public int compareTo(Segment sid)

Specified by:

compareTo in interface Comparable<Segment>