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.
May also be used to take the output of an ICLUST analysis and find a keys matrix. (By doing a call to the factor2cluster function.
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.
# NOT RUN {test.data <- Harman74.cor$cov
kc <- kmeans(test.data,4)
keys <- cluster2keys(kc)
keys #these match those found by ICLUSTcluster.cor(keys,test.data)
# }