Extract all terminal status from a collection of spatial interaction models

The function extract terminal status from all the spatial interaction models of the collection and returns them in a matrix in which each row corresponds to a model and each column to a destination location. The value at row i and column j is TRUE if destination j is a terminal in model i. This function applies only to non bipartite models.

Usage

grid_is_terminal(sim_list, definition = c("ND", "RW"), ...)

Arguments

sim_list: a collection of non bipartite spatial interaction models, an object of class sim_list
definition: terminal definition, either "ND" (for Nystuen & Dacey, default) or "RW" (for Rihll & Wilson), see details.
...: additional parameters for the is_terminal() function

Value

a matrix of terminal status at the destination locations

Details

See terminals() for the definition of terminal locations.

Examples

positions <- matrix(rnorm(15 * 2), ncol = 2)
distances <- as.matrix(dist(positions))
production <- rep(1, 15)
attractiveness <- rep(1, 15)
all_flows <- grid_blvim(distances,
  production,
  c(1.1, 1.25, 1.5),
  c(1, 2, 3),
  attractiveness,
  bipartite = FALSE,
  epsilon = 0.1
)
g_df <- grid_is_terminal(all_flows)
## should be 9 rows (3 times 3 parameter pairs) and 15 columns (15 destination
## locations)
dim(g_df)
#> [1]  9 15