calcSpaceMat {AST} | R Documentation |

## 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)
```

[Package

*AST*version 0.1.0 Index]