utilities: Various utility functions
In gclus: Clustering Graphics

Description Usage Arguments Author(s) See Also Examples

vec2distm converts a vector to a distance matrix.

vec2dist converts a vector to a dist structure.

lower2upper.tri.inds is the same as lower.to.upper.tri.inds from package cluster. It computes an index vector for extracting or reordering a lower triangular matrix that is stored as a contiguous vectors.

diag.off returns a vector of off-diagonal elements of a matrix. off specifies the distance above the main (0) diagonal.

clus2memship converts a list whose ith element contains the indices of objects in the ith cluster into a vector whose ith element gives the cluster number of the ith object.

memship2clus converts a vector whose ith element gives the cluster number of the ith object into a list whose ith element contains the indices of objects in the ith cluster.

vec2distm(vec)
vec2dist(vec)
lower2upper.tri.inds(n)
diag.off(m,off=1)
clus2memship(clusters)
memship2clus(memship)

`vec`	is a vector.
`n`	is an integer > 1.
`m`	is a matrix.
`clusters`	is a list whose ith element contains the indices of the objects belonging to the ith cluster.
`off`	is an integer specifying the distance above the main (0) diagonal.
`memship`	is a vector whose ith element gives the cluster number of the ith object.

Catherine B. Hurley

dist, diag.

vec <- 1:15
vec2distm(vec)
vec2dist(vec)
diag.off(vec2distm(vec))
lower2upper.tri.inds(5)
clus2memship(list(c(1,3,5),c(2,6),4))
memship2clus(c(1,3,4,2,1,4,2,3,2,3))