Calculates Rousseeuw's Silhouette internal cluster quality index
Description
Calculates Rousseeuw's Silhouette internal cluster quality index
Usage
index.S(d,cl,singleObject=0)
Arguments
d
'dist' object
cl
A vector of integers indicating the cluster to which each object is allocated
singleObject
0 - s(i)=0 or 1 - s(i)=1. When cluster contains a single object, it is unclear how a(i) of Silhouette index should be defined (see Kaufman & Rousseeuw (1990), p. 85).
Details
See file $R_HOMElibraryclusterSimpdfindexS_details.pdf for further details
Gatnar, E., Walesiak, M. (Eds.) (2004), Metody statystycznej analizy wielowymiarowej w badaniach marketingowych [Multivariate statistical analysis methods in marketing research], Wydawnictwo AE, Wroclaw, 342-343, erratum.
Kaufman, L., Rousseeuw, P.J. (1990), Finding groups in data: an introduction to cluster analysis, Wiley, New York, 83-88.