Check if unique elements of a vector appear in contiguous clusters

Description

ordered.clusters determines if identical elements of a vector appear in contiguous clusters, and returns TRUE if the do and FALSE otherwise.

Usage

ordered.clusters(id)

Arguments

Value

The function returns TRUE if the elements appear in contiguous clusters and FALSE otherwise

Author(s)

Claus Ekstrom claus@ekstroem.dk with suggestions from Peter Dalgaard.

See Also

duplicated

Examples

x <- c(1, 1, 1, 2, 2, 3, 4, 1, 5, 5, 5)
ordered.clusters(x)
ordered.clusters(sort(x))
ordered.clusters(x[order(x)])