cross_spatial_adjacency: Cross Spatial Adjacency

In bbuchsbaum/neighborweights: Constructing Adjacency Matrices Based on Spatial and Feature Similarity

Cross Spatial Adjacency

Description

Constructs a cross spatial adjacency matrix between two sets of points, where weights are determined by spatial relationships.

Usage

cross_spatial_adjacency(
  coord_mat1,
  coord_mat2,
  dthresh = sigma * 3,
  nnk = 27,
  weight_mode = c("binary", "heat"),
  sigma = 5,
  normalized = TRUE
)

Arguments

coord_mat1	A matrix with the spatial coordinates of the first set of data points, where each row represents a point and each column represents a coordinate dimension.
coord_mat2	A matrix with the spatial coordinates of the second set of data points, where each row represents a point and each column represents a coordinate dimension.
dthresh	The distance threshold for nearest neighbors (default: sigma * 3).
nnk	The number of nearest neighbors to consider (default: 27).
weight_mode	The mode to use for weighting the adjacency matrix, either "binary" or "heat" (default: "binary").
sigma	The bandwidth for heat kernel weights (default: 5).
normalized	A logical value indicating whether to normalize the adjacency matrix (default: TRUE).

Value

A sparse cross adjacency matrix with weighted spatial relationships between the two sets of points.

Examples

coord_mat1 <- as.matrix(expand.grid(x=1:5, y=1:5, z=1:5))
coord_mat2 <- as.matrix(expand.grid(x=6:10, y=6:10, z=6:10))
csa <- cross_spatial_adjacency(coord_mat1, coord_mat2, nnk=3, weight_mode="binary", sigma=5, normalized=TRUE)

bbuchsbaum/neighborweights documentation built on April 1, 2024, 8:41 p.m.