spdep (version 0.5-74)

summary.nb: 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

## S3 method for class 'nb':
summary(object, coords=NULL, longlat = NULL, scale = 1, ...)
## S3 method for class 'nb':
print(x, ...)
## S3 method for class 'listw':
summary(object, coords, longlat, zero.policy = NULL,
 scale = 1, ...)
## S3 method for class 'listw':
print(x, zero.policy = NULL, ...)

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

default NULL, use global option value; if FALSE stop with error for any empty neighbour sets

scale

passed through to stem() for control of plot length

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)