spBayes (version 0.2-4)

synthetic.dat: Synthetic univariate data used for illustrations

Description

The synthetic datasets were generated from a stationary and isotropic spatial process using an exponential correlation function (code below).

Usage

data(rf.n200.dat)
data(rf.n500.dat)
data(rf.n1000.dat)

format

The rf.n200.dat, rf.n500.dat, rf.n1000.dat files contain n rows (i.e., points) and 4 columns. Column 1, Y, is the response variable. Column 2, w, is the vector of random spatial effects. Columns 4 and 5 are the x and y coordinates.

Examples

##These synthetic data were generated with the following:

##n <- 200
##n <- 500
n <- 1000

coords <- cbind(runif(n, 1, 10), runif(n, 1, 10))

sigma.sq <- 10
tau.sq <- 1
phi <- 3/5

C <- sigma.sq*exp(-phi*as.matrix(dist(coords)))
w <- mvrnorm(1, rep(0,n), C)

Y <- w+rnorm(n, 0, sqrt(tau.sq))