Returns the conversion factors between attractivenesses and incoming flows

Some spatial interaction models use conversion factors between attractivenesses and incoming flows to check whether they are at equilibrium (see for instance blvim()). This function retuns the conversion factors used to build this sim is applicable, and NA when not applicable.

Usage

sim_conversion(sim, ...)

Arguments

sim

a spatial interaction model object (an object of class sim)

...

additional parameters

Value

NA or a vector of conversion factors, see above.

See also

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)
sim_conversion(model) ## must NA
#> [1] NA