Dist_mat_latt: Lattice population distribution (with buddy).

In BenjamenSimon/EpidemicR: Stochastic modelling and inference for epidemics.

Description

This function generates a distance matrix for individuals on a lattice, across a specified rectangular plane. There is also the option to generate a "buddy" for each individual.

Usage

Dist_mat_latt(N, nrow, xlim = 20, ylim = 20, buddy = TRUE)

Arguments

N	The total number of individuals in the population.
nrow	The number of rows of the lattice. N must be divisible by nrow.
xlim	The width of the plane on which individuals will be generated (defaults to 20 units wide).
ylim	The height of the place on which individuals will be generated (defaults to 20 units high).
buddy	Dicatates whether to generate a "buddy" for each point, generated from an isotropic distribution around each point with variance (xlim/200, ylim/200).

Value

The function returns a list. The first object in the list is a Nx2 matrix of the coordinates of the individuals. The second object is an NxN distance matrix.

Examples

xy.coords <- Dist_mat_latt(N = 200, nrow = 10, xlim = 20, ylim = 20, buddy = TRUE)[[1]]
distance_mat <- Dist_mat_latt(N = 200, nrow = 10, xlim = 20, ylim = 20, buddy = TRUE)[[2]]
plot(xy.coords[,1], xy.coords[,2], type  = "p")

BenjamenSimon/EpidemicR documentation built on March 23, 2020, 11:03 p.m.