simulation: Running a whole simulation of a doubly constrained gravity...

In cppSim: Fast and Memory Efficient Spatial Interaction Models

Running a whole simulation of a doubly constrained gravity model

Description

this script takes flows data, distance matrix, and a reference beta parameter and finds the optimal beta value for the model, runs it, and returns the result and the beta of best fit.

currently only the exp value is accepted for the cost_fun parameter.

Usage

simulation(flows_matrix, dist_matrix, beta_offset = 0.25)

Arguments

flows_matrix	a integer matrix of flows
dist_matrix	a distance matrix containing numeric values in kilometers
beta_offset	an offset from 0 from which to start looking for the best fit value.

Value

creates a folder based on the run_name parameter to which images and files are written. The file run_name_best_fit.rds contain the matrices with values from the model , and the quality of fit values for the beta values.

Examples

data(flows_test)
data(distance_test)

model <- simulation(flows_test,distance_test)

cppSim documentation built on Sept. 9, 2025, 5:50 p.m.