R: Test of neighborhood list

nbtest {prabclus} | R Documentation

## Test of neighborhood list

### Description

Tests a list of neighboring regions for proper format. Neighborhood is tested for being symmetrical. Causes an error if tests fail.

### Usage

    nbtest(nblist, n.regions=length(nblist))

### Arguments

`nblist` | A list with a component for every region. The components are vectors of integers indicating neighboring regions. A region without neighbors (e.g., an island) should be assigned a vector `numeric(0)`.
`n.regions` | Number of regions.

### Value

`invisible{TRUE}`.

### Author(s)

Christian Hennig chrish@stats.ucl.ac.uk http://www.homepages.ucl.ac.uk/~ucakche

### See Also

`prabinit`.

### Examples

    data(nb)
    nbtest(nb)
    nb[[1]][1] <- 1
    try(nbtest(nb))

[Package prabclus version 2.2-6 Index]