summary.nb {spdep} | R Documentation

## Print and summary function for neighbours and weights lists

### Description

The function prints summary measures for links in a neighbours list. If a matrix of coordinates is given as well, summary descriptive measures for the link lengths are also printed. Print and summary functions are also available for `"listw"` weights list objects.

### Usage

    summary.nb(object, coords=NULL, longlat = NULL, scale = 1, ...)
    print.nb(x, ...)
    summary.listw(object, coords, longlat, zero.policy = FALSE,
     scale = 1, ...)
    print.listw(x, zero.policy = FALSE, ...)

### Arguments

`object` | an object of class `nb`
`coords` | matrix of region point coordinates or a SpatialPoints object
`longlat` | TRUE if point coordinates are longitude-latitude decimal degrees, in which case distances are measured in kilometers; if coords is a SpatialPoints object, the value is taken from the object itself
`...` | additional arguments affecting the output produced
`x` | an object of class `nb`
`zero.policy` | If FALSE stop with error for any empty neighbour sets
`scale` | passed through to `stem()` for control of plot length

### Author(s)

Roger Bivand Roger.Bivand@nhh.no

### See Also

`plot.nb`

### Examples

    example(columbus)
    coords <- coordinates(columbus)
    col.gal.nb
    summary(col.gal.nb, coords)
    col.listw <- nb2listw(col.gal.nb, style="W")
    col.listw
    summary(col.listw)

[Package spdep version 0.4-56 Index]