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Contiguity Spatial Weights

Source: R/st_wt.R
st_contiguity_weights.Rd

Create a contiguity spatial weights with options of "queen", "order", "include lower order" and "precision threshold"

Usage

st_contiguity_weights(
  sfj,
  queen = TRUE,
  order = 1,
  include_lower_order = FALSE,
  precision_threshold = 0
)

Arguments

sfj

An sf (simple feature) object.

queen

(Optional) TRUE (default) or FALSE, TRUE implements Queen Contiguity and FALSE implements Rook Contiguity.

order

(Optional) Order of contiguity, default is 1.

include_lower_order

(Optional) Whether or not the lower order neighbors should be included in the weights structure,default is False.

precision_threshold

(Optional) The precision of the underlying shape file is insufficient to allow for an exact match of coordinates to determine which polygons are neighbors,default is 0.

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)
queenw = st_contiguity_weights(guerry,queen = TRUE)