Identifies the k nearest neighbors for given point geometry. If polygon geometry is provided, the centroids of the polygon will be used and a warning will be emitted.
Arguments
- x
an sf or sfc object.
- k
number of nearest neighbours to be returned
- symmetric
default
FALSE. Whether to force output of neighbours to be symmetric.- ...
additional arguments to be passed to
knearneigh().
Details
This function utilizes spdep::knearneigh() and spdep::knn2nb().
See also
Other neighbors:
st_contiguity(),
st_nb_band()
Examples
st_knn(sf::st_geometry(guerry), k = 8)
#> ! Polygon provided. Using centroid.
#> Neighbour list object:
#> Number of regions: 85
#> Number of nonzero links: 680
#> Percentage nonzero weights: 9.411765
#> Average number of links: 8
#> Non-symmetric neighbours list