Extract the initial attractivenesses from a spatial interaction model object

Extracts the destination attractivenesses used to initialise the construction of a spatial interaction model. For static models, this is identical to their attractiveness(). For a spatial interaction model produced by an iterative algorithm, this function returns the attractivenesses used to initialise the algorithm. attractiveness() returns the final attractivenesses.

Usage

initial_attractiveness(sim, ...)

Arguments

sim

a spatial interaction model object

...

additional parameters

Value

A vector containing the initial destination attractivenesses.

See also

attractiveness(), static_blvim()

Examples

distances <- french_cities_distances[1:10, 1:10] / 1000 ## convert to km
production <- log(french_cities$population[1:10])
attractiveness <- log(french_cities$area[1:10])
model <- static_blvim(distances, production, 1.5, 1 / 250, attractiveness)
initial_attractiveness(model)
#>    75056    13055    69123    31555    06088    44109    34172    67482 
#> 4.657386 5.471989 3.870665 4.771153 4.301425 4.185492 4.044746 4.359355 
#>    33063    59350 
#> 3.907493 3.548148 
identical(
  initial_attractiveness(model),
  attractiveness(model)
)
#> [1] TRUE