cluster, psych, pastecs, NbClust, graphics, grDevices, stats,
utils, GPArotation
cluster, graphics, grDevices, NbClust, pastecs, psych, stats,
utils
cluster, GPArotation, graphics, grDevices, NbClust, pastecs,
psych, stats, utils
stats, cluster, clusterCrit, fclust, igraph, e1071