Distance-based Spatial Weights — st_distance

Create a distance-based weights

Usage

st_distance_weights(
  sfj,
  unit = "km",
  dist_thres = NULL,
  power = 1,
  is_inverse = FALSE
)

Arguments

sfj: An sf (simple feature) object.
unit: (optional) The unit for calculating spatial distance, can be 'km'(default) or 'mile'.
dist_thres: (optional) A positive numeric value of distance threshold.
power: (optional) The power (or exponent) of a number indicates how many times to use the number in a multiplication.Default is 1.
is_inverse: (optional) FALSE (default) or TRUE, apply inverse on distance value.

Value

An instance of rgeoda Weight-class.

Author

Wenbo Lv lyu.geosocial@gmail.com

Examples

guerry_path = system.file("extdata", "Guerry.shp", package = "rgeoda")
guerry = sf::read_sf(guerry_path)
st_distance_weights(guerry)
#> Reference class object of class "Weight"
#> Field "gda_w":
#> An object of class "p_GeoDaWeight"
#> Slot "pointer":
#> <pointer: 0x55c286cccfb0>
#> 
#> Field "is_symmetric":
#> [1] TRUE
#> Field "sparsity":
#> [1] 0.04346021
#> Field "min_neighbors":
#> [1] 1
#> Field "max_neighbors":
#> [1] 7
#> Field "num_obs":
#> [1] 85
#> Field "mean_neighbors":
#> [1] 3.694118
#> Field "median_neighbors":
#> [1] 4
#> Field "has_isolates":
#> [1] FALSE