psych (version 1.0-77)

cluster2keys: Convert a cluster vector (from e.g., kmeans) to a keys matrix suitable for scoring item clusters.

Description

The output of the kmeans clustering function produces a vector of cluster membership. The score.items and cluster.cor functions require a matrix of keys. cluster2keys does this.

Usage

cluster2keys(c)

Arguments

c

A vector of cluster assignments or an object of class ``kmeans" that contains a vector of clusters.

Value

• keys
  A matrix of keys suitable for score.items or cluster.cor

Details

Note that because kmeans will not reverse score items, the clusters defined by kmeans will not necessarily match those of ICLUST with the same number of clusters extracted.

See Also

cluster.cor,score.items

Examples

test.data <- Harman74.cor$cov
kc <- kmeans(test.data,4)
keys <- cluster2keys(kc)
keys  #these match those found by ICLUST
cluster.cor(keys,test.data)