include.self: Include self in neighbours list
In spdep: Spatial Dependence: Weighting Schemes, Statistics and Models

Description Usage Arguments Value Author(s) See Also Examples

The function includes the region itself in its own list of neighbours, and sets attribute "self.included" to TRUE.

1	include.self(nb)

`nb`	input neighbours list of class `nb`

The function returns an object of class nb with a list of integer vectors containing neighbour region number ids; attribute "self.included" is set to TRUE.

Roger Bivand Roger.Bivand@nhh.no

summary.nb

example(columbus)
coords <- coordinates(columbus)
summary(col.gal.nb, coords)
summary(include.self(col.gal.nb), coords)

Loading required package: sp
Loading required package: Matrix

colmbs> require(maptools)
Loading required package: maptools
Checking rgeos availability: TRUE

colmbs> columbus <- readShapePoly(system.file("etc/shapes/columbus.shp",
colmbs+  package="spdep")[1])

colmbs> col.gal.nb <- read.gal(system.file("etc/weights/columbus.gal",
colmbs+  package="spdep")[1])
Warning message:
use rgdal::readOGR or sf::st_read 
Neighbour list object:
Number of regions: 49 
Number of nonzero links: 230 
Percentage nonzero weights: 9.579342 
Average number of links: 4.693878 
Link number distribution:

 2  3  4  5  6  7  8  9 10 
 7  7 13  4  9  6  1  1  1 
7 least connected regions:
1 6 31 39 42 46 47 with 2 links
1 most connected region:
20 with 10 links
Summary of link distances:
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
 0.1276  0.3613  0.4566  0.4694  0.5536  0.8924 

  The decimal point is 1 digit(s) to the left of the |

  1 | 3344
  1 | 99
  2 | 000011333344
  2 | 556677779999
  3 | 000011222222223344444444
  3 | 556666777777888888889999999999
  4 | 00001111112233333333334444
  4 | 55666666666666777777777788888899
  5 | 0011112222222222222233334444
  5 | 556666667788
  6 | 000000112244
  6 | 5577889999
  7 | 11112244
  7 | 557777
  8 | 1144
  8 | 55999999

Neighbour list object:
Number of regions: 49 
Number of nonzero links: 279 
Percentage nonzero weights: 11.62016 
Average number of links: 5.693878 
Link number distribution:

 3  4  5  6  7  8  9 10 11 
 7  7 13  4  9  6  1  1  1 
7 least connected regions:
1 6 31 39 42 46 47 with 3 links
1 most connected region:
20 with 11 links
Summary of link distances:
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
 0.0000  0.2576  0.4073  0.3870  0.5232  0.8924 

  The decimal point is 1 digit(s) to the left of the |

  0 | 0000000000000000000000000000000000000000000000000
  0 | 
  1 | 3344
  1 | 99
  2 | 000011333344
  2 | 556677779999
  3 | 000011222222223344444444
  3 | 556666777777888888889999999999
  4 | 00001111112233333333334444
  4 | 55666666666666777777777788888899
  5 | 0011112222222222222233334444
  5 | 556666667788
  6 | 000000112244
  6 | 5577889999
  7 | 11112244
  7 | 557777
  8 | 1144
  8 | 55999999