Class PointDistanceCache

java.lang.Object

org.ojalgo.data.cluster.PointDistanceCache

final class PointDistanceCache
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private double[][]	myDistances
private final SampleSet	mySampleSet
private final NumberList<Double>	myValues

Constructor Summary

Constructors

Constructor	Description
PointDistanceCache()

Method Summary

Modifier and Type	Method	Description
(package private) Point	centroid(Collection<Point> cluster)	Pick the centroid for this cluster (one of its current members)
private double	distance(int i, int j)
(package private) double	distance(Point point1, Point point2)	Get the distance between these two points.
(package private) double	getThreshold()	The distance threshold used in initialiser(Collection) to determine when the greedy clustering algorithm should not place a point in any of the existing clusters, but rather create a new cluster.
(package private) List<Point>	initialiser(Collection<Point> input)	Generate an initial set of centroids
(package private) void	setup(Collection<Point> input, DistanceMeasure measure)	Set up the cache (configure this instance)

Methods inherited from class Object

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

Field Details

myDistances

private double[][] myDistances

mySampleSet

private final SampleSet mySampleSet

myValues

private final NumberList<Double> myValues

Constructor Details

PointDistanceCache

PointDistanceCache()

Method Details

distance

private double distance(int i,
 int j)

centroid

Point centroid(Collection<Point> cluster)

Pick the centroid for this cluster (one of its current members)

distance

double distance(Point point1,
 Point point2)

Get the distance between these two points.

getThreshold

double getThreshold()

The distance threshold used in initialiser(Collection) to determine when the greedy clustering algorithm should not place a point in any of the existing clusters, but rather create a new cluster.

initialiser

List<Point> initialiser(Collection<Point> input)

Generate an initial set of centroids

setup

void setup(Collection<Point> input,
 DistanceMeasure measure)

Set up the cache (configure this instance)