clusters

package
v0.2.0-mixed Latest Latest
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 Go to latest Published: Aug 9, 2021 License: LGPL-2.1 Imports: 5 Imported by: 0

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Index

Constants

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Variables

This section is empty.

Functions

func AverageDistance 

func AverageDistance(point space.Point, points PointList) float64

AverageDistance returns the average distance between o and all PointList

Types

type Cluster 

type Cluster struct {
	C      int   //dbscan
	Points []int //dbscan

	Center    space.Point
	PointList PointList
}

A Cluster which data points gravitate around

func (*Cluster) Append 

func (c *Cluster) Append(point space.Point)

Append adds an observation to the Cluster

func (Cluster) PointsInDimension 

func (c Cluster) PointsInDimension(n int) (v []float64)

PointsInDimension returns all coordinates in a given dimension

func (*Cluster) Recenter 

func (c *Cluster) Recenter()

Recenter recenters a cluster

type Clusters 

type Clusters []Cluster

Clusters is a slice of clusters

func New 

func New(k int, dataset PointList) (Clusters, error)

New sets up a new set of clusters and randomly seeds their initial positions

func (Clusters) CentersInDimension 

func (c Clusters) CentersInDimension(n int) (v []float64)

CentersInDimension returns all cluster centroids' coordinates in a given dimension

func (Clusters) Nearest 

func (c Clusters) Nearest(point space.Point) int

Nearest returns the index of the cluster nearest to point

func (Clusters) Neighbour 

func (c Clusters) Neighbour(point space.Point, fromCluster int) (int, float64)

Neighbour returns the neighbouring cluster of a point along with the average distance to its points

func (Clusters) Recenter 

func (c Clusters) Recenter()

Recenter recenters all clusters

func (Clusters) Reset 

func (c Clusters) Reset()

Reset clears all point assignments

type PointList 

type PointList []space.Point

PointList is a slice of Point

func (PointList) Center 

func (points PointList) Center() (p space.Point, err error)

Center returns the center coordinates of a set of Points

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