Linkage (OpenChemLib 2021.2.0 API)

java.lang.Object
- smile.clustering.linkage.Linkage

Direct Known Subclasses:

CompleteLinkage, SingleLinkage, UPGMALinkage, UPGMCLinkage, WardLinkage, WPGMALinkage, WPGMCLinkage
```
public abstract class Linkage
extends java.lang.Object
```
A measure of dissimilarity between clusters (i.e. sets of observations).
References
1. Anil K. Jain, Richard C. Dubes. Algorithms for clustering data. 1988.
Author:

Haifeng Li

See Also:

HierarchicalClustering

Constructor Summary

Constructors
Constructor Description

Linkage()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`float`	`d(int i, int j)`	Returns the distance/dissimilarity between two clusters/objects, which are indexed by integers.
`abstract void`	`merge(int i, int j)`	Merge two clusters into one and update the proximity matrix.
`int`	`size()`	Returns the proximity matrix size.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Linkage
```
public Linkage()
```
- Method Detail
  - size
```
public int size()
```
    Returns the proximity matrix size.
  - d
```
public float d(int i,
               int j)
```
    Returns the distance/dissimilarity between two clusters/objects, which are indexed by integers.
  - merge
```
public abstract void merge(int i,
                           int j)
```
    Merge two clusters into one and update the proximity matrix.
    
    Parameters:
    
    i - cluster id.
    
    j - cluster id.