spdep (version 0.6-15)

getisord: Getis-Ord remote sensing example data

Description

The xyz data frame has 256 rows and 3 columns. Vectors x and y are of length 16 and give the centres of the grid rows and columns, 30m apart. The data start from the bottom left, Getis and Ord start from the top left - so their 136th grid cell is our 120th.

Usage

data(getisord)

Format

This data frame contains the following columns:

x

grid eastings

y

grid northings

val

remote sensing values

Examples

# NOT RUN {
data(getisord)
image(x, y, t(matrix(xyz$val, nrow=16, ncol=16, byrow=TRUE)), asp=1)
text(xyz$x, xyz$y, xyz$val, cex=0.7)
polygon(c(195,225,225,195), c(195,195,225,225), lwd=2)
title(main="Getis-Ord 1996 remote sensing data")
# }