fclust (version 1.0.1)

PC: Partition coefficient

Description

Produces the partition coefficient index. The optimal number of cluster k is achieved when the index value is maximized.

Usage

PC (U)

Arguments

U

Membership degree matrix

Value

• pc
  Value of the partition coefficient index

References

Bezdek J.C., 1974. Cluster validity with fuzzy sets. Journal of Cybernetics, 3, 58-73.

See Also

PE, MPC, SIL, SIL.F, 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)
pc=PC(clust$U)