Package elki.clustering.hierarchical.linkage

Interface GeometricLinkage

All Superinterfaces:

Linkage

All Known Implementing Classes:

CentroidLinkage, MedianLinkage, WardLinkage

public interface GeometricLinkage
extends Linkage

Geometric linkages, in addition to the combination with Lance-Williams-Equations, these linkages can also be computed by aggregating data points (for vector data only).

Since:

0.8.0

Author:

Robert Gehde

Method Summary

Modifier and Type	Method	Description
double	distance(double[] x, int sizex, double[] y, int sizey)	Distance of two aggregated clusters.
double[]	merge(double[] x, int sizex, double[] y, int sizey)	Merge the aggregated vectors.

Methods inherited from interface elki.clustering.hierarchical.linkage.Linkage

combine, initial, restore

Method Detail

merge

double[] merge(double[] x,
               int sizex,
               double[] y,
               int sizey)

Merge the aggregated vectors.

Parameters:

x - Center of the first cluster

sizex - Weight of the first cluster

y - Center of the second cluster

sizey - Weight of the second cluster

Returns:

Combined vector

distance

double distance(double[] x,
                int sizex,
                double[] y,
                int sizey)

Distance of two aggregated clusters.

Parameters:

x - Center of the first cluster

sizex - Weight of the first cluster

y - Center of the second cluster

sizey - Weight of the second cluster

Returns:

Distance