An S4 class to represent a permutation order.

`rows`

An

`integer`

vector giving the rows permutation.`columns`

An

`integer`

vector giving the columns permutation.`method`

A

`character`

string indicating the seriation method used.

In the code snippets below, `x`

is a `PermutationOrder`

object.

`x[[i]]`

Extracts information from a slot selected by subscript

`i`

.`i`

is a length-one`character`

vector. Returns the corresponding slot values.

Other class:
`DiversityIndex`

,
`RefineCA-class`

N. Frerebeau