nbdists.Rd
Given a list of spatial neighbour links (a neighbours list of object type
nb
), the function returns the Euclidean distances along the links
in a list of the same form as the neighbours list. If longlat = TRUE, Great
Circle distances are used.
nbdists(nb, coords, longlat = NULL)
an object of class nb
matrix of point coordinates, an object inheriting from SpatialPoints or an "sf"
or "sfc"
object; if the "sf"
or "sfc"
object geometries are in geographical coordinates (sf::st_is_longlat(x) == TRUE
and sf::sf_use_s2() == TRUE
), s2 will be used to find distances https://github.com/r-spatial/s2/issues/125
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
A list with class nbdist
columbus <- st_read(system.file("shapes/columbus.shp", package="spData")[1], quiet=TRUE)
col.gal.nb <- read.gal(system.file("weights/columbus.gal", package="spData")[1])
coords <- coordinates(as(columbus, "Spatial"))
dlist <- nbdists(col.gal.nb, coords)
dlist <- lapply(dlist, function(x) 1/x)
stem(unlist(dlist))
#>
#> The decimal point is at the |
#>
#> 1 | 1111112222223333334444444444
#> 1 | 555555556666667777777777888888888899999999999999999999
#> 2 | 00000000111111111111111122222222222222333333333333334444
#> 2 | 55555555556666666666666677777777888888999999
#> 3 | 0000111111222233334444
#> 3 | 77779999
#> 4 | 223344
#> 4 | 77
#> 5 | 001144
#> 5 |
#> 6 |
#> 6 | 99
#> 7 |
#> 7 | 88
#>