index.S {clusterSim}R Documentation

Calculates Rousseeuw's Silhouette internal cluster quality index

Description

Calculates Rousseeuw's Silhouette internal cluster quality index

Usage

index.S(d,cl)

Arguments

d 'dist' object
cl A vector of integers indicating the cluster to which each object is allocated

Details

See file $R_HOME\library\clusterSim\pdf\indexS_details.pdf for further details

Value

calculated Silhouette index

Author(s)

Marek Walesiak Marek.Walesiak@ae.jgora.pl, Andrzej Dudek Andrzej.Dudek@ae.jgora.pl

Department of Econometrics and Computer Science, University of Economics, Wroclaw, Poland http://www.ae.jgora.pl/keii

References

Gatnar, E., Walesiak, M. (Eds.) (2004), Metody statystycznej analizy wielowymiarowej w badaniach marketingowych [Multivariate statistical analysis methods in marketing research], Wydawnictwo AE, Wroclaw, pp. 342-343, erratum.

Kaufman, L., Rousseeuw, P.J. (1990), Finding groups in data: an introduction to cluster analysis, Wiley, New York, pp. 83-88.

See Also

index.G1, index.G2, index.G3, index.KL, index.H, index.Gap

Examples

library(clusterSim)
data(data_ratio)
d <- dist.GDM(data_ratio)
c <- pam(d, 5, diss = TRUE)
icq <- index.S(d,c$clustering)
print(icq)

[Package clusterSim version 0.30-7 Index]