Modified-Huff-Three-Step Floating Catchment Area method
spai_mh3sfca(p, s, W, step = 3)
numeric vector, number of population at origin locations
numeric vector, capacity of services at supply locations
numeric matrix, distance or time matrix
numeric, number of the steps of the method to perform
data.frame, depending on selected step
p <- 1:4
s <- 1:6
W <- matrix(1:24, ncol = 4, nrow = 6)
spai <- spai_mh3sfca(p, s, W, step = 3)