Umatrix (version 4.0.1)

ustarmatrixCalc: ustarmatrixCalc

Description

The UStarMatrix is a combination of the Umatrix (average distance to neighbours) and Pmatrix (density in a point). It can be used to improve the Umatrix, if the dataset contains density based structures.

Value

UStarMatrix

Arguments

Umatrix

A given Umatrix

Pmatrix

A density matrix

References

Ultsch, A. U* C: Self-organized Clustering with Emergent Feature Maps. in Lernen, Wissensentdeckung und Adaptivitaet (LWA). 2005. Saarbruecken, Germany.

Examples

data("Hepta")
e = esomTrain(Hepta$Data, Key = 1:nrow(Hepta$Data))
Pmatrix = pmatrixForEsom(Hepta$Data,
                         e$Weights,
                         e$Lines,
                         e$Columns,
                          e$Toroid)
Ustarmatrix = ustarmatrixCalc(e$Umatrix, Pmatrix)
plotMatrix(Ustarmatrix, e$BestMatches)