spData (version 2.3.3)

getisord: Getis-Ord remote sensing example data

Description

The go_xyz data frame has 256 rows and 3 columns. Vectors go_x and go_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.

Format

This data frame contains the following columns:

• x: grid eastings

• y: grid northings

• val: remote sensing values

Examples

data(getisord)
image(go_x, go_y, t(matrix(go_xyz$val, nrow = 16, ncol=16, byrow = TRUE)), asp = 1)
text(go_xyz$x, go_xyz$y, go_xyz$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")