Class Point

java.lang.Object

org.ojalgo.data.cluster.Point

All Implemented Interfaces:

Comparable<Point>

public final class Point
extends Object
implements Comparable<Point>

Immutable coordinate point used by the clustering utilities. A Point wraps a float[] (to minimise memory footprint) and an id. Distance calculations are central to most algorithms.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	Point.Factory	Simple factory that generates consecutive ids and ensures consistent dimensionality.

Field Summary

Fields

Modifier and Type	Field	Description
final float[]	coordinates	Features
final int	id	Index/Key

Constructor Summary

Constructors

Constructor	Description
Point(int id, float[] coordinates)

Method Summary

Modifier and Type	Method	Description
int	compareTo(Point ref)
double	distance(DistanceMeasure measure, Point other)	Distance using the supplied DistanceMeasure.
boolean	equals(Object obj)
int	hashCode()
static double[]	mean(Collection<Point> points)
static Point.Factory	newFactory()
static Point	of(int id, float... coordinates)	Creates a point with the supplied id and coordinates (no defensive copy).
String	toString()

Methods inherited from class Object

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

Field Details

coordinates

public final float[] coordinates

Features

id

public final int id

Index/Key

Constructor Details

Point

Point(int id,
 float[] coordinates)

Method Details

mean

public static double[] mean(Collection<Point> points)

newFactory

public static Point.Factory newFactory()

of

public static Point of(int id,
 float... coordinates)

Creates a point with the supplied id and coordinates (no defensive copy). Caller must ensure the coordinate array is not mutated afterwards if logical immutability is desired.

compareTo

public int compareTo(Point ref)

Specified by:

compareTo in interface Comparable<Point>

distance

public double distance(DistanceMeasure measure,
 Point other)

Distance using the supplied DistanceMeasure.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object