calcSpaceMat {AST}

Space Matrix Calculation for AST

Description

a function that calculates the space matrix for AST model by determining adjacent locations and give them equal weights 1 and 0 for non-neighbors.

Usage

calcSpaceMat(adjacent.mat, par.space = 0.9)

Arguments

adjacent.mat

a matrix for adjacent locations with weight 1 and 0 for non-neighbors. Rownames of this matrix must be match with location variable.

par.space

A parameter which specify the amount of correlation between adjacent locations.

Value

a square matrix

Note

rowname of space matrix should be numeric and the same as location variable in data.residual.

If a shapefile is used for making adjacent matrix, package "spdep" can be used to identify neighbors.

Author(s)

Parinaz Mehdipour, Ali Ghanbari

Examples

library("AST")
data(data.adjacent.mat,package="AST")
calcSpaceMat(data.adjacent.mat,par.space=0.9)