fclust (version 1.0.1)

SIL.F: Fuzzy silhouette index

Description

Produces the fuzzy silhouette index. The optimal number of cluster k is achieved when the index value is maximized.

Usage

SIL.F (Xca, U, alpha)

Arguments

Xca

Matrix or data.frame

U

Membership degree matrix

alpha

Weighting coefficient (default: 1)

Value

• sil.f
  Value of the fuzzy silhouette index

References

Campello R.J.G.B., Hruschka E.R., 2006. A fuzzy extension of the silhouette width criterion for cluster analysis. Fuzzy Sets and Systems, 157, 2858-2875.

See Also

PC, PE, MPC, SIL, XB, Fclust

Examples

data(Mc)
for (j in 2:(ncol(Mc)-1))
Mc[,j]=Mc[,j]/Mc[,1]
Mc=Mc[,-1]
clust=FKM(Mc[,1:(ncol(Mc)-1)],k=6,m=1.5,stand=1)
sil.f=SIL.F(clust$Xca,clust$U)