Description Usage Format Source Examples
This data set contains eight different spatial configurations that were used by Morrill (1991) and Wong (1993) to test their segregation measures.
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An object of class data.frame
. The data set contains 16 columns, representing eight idealised spatial patterns. Each column indicates the following information:
[,1] | A1 | Pattern A, Group 1 |
[,2] | A2 | Pattern A, Group 2 |
[,3] | B1 | Pattern B, Group 1 |
[,4] | B2 | Pattern B, Group 2 |
[,5] | C1 | Pattern C, Group 1 |
[,6] | C2 | Pattern C, Group 2 |
[,7] | D1 | Pattern D, Group 1 |
[,8] | D2 | Pattern D, Group 2 |
[,9] | E1 | Pattern E, Group 1 |
[,10] | E2 | Pattern E, Group 2 |
[,11] | F1 | Pattern F, Group 1 |
[,12] | F2 | Pattern F, Group 2 |
[,13] | G1 | Pattern G, Group 1 |
[,14] | G2 | Pattern G, Group 2 |
[,15] | H1 | Pattern H, Group 1 |
[,16] | H2 | Pattern H, Group 2 |
Morrill, R. L. (1991). On the measure of geographic segregation. Geography Research Forum, 11, 25-36.
Wong, D. W. S. (1993). Spatial Indices of Segregation. Urban Studies, 30, 559-572.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | data(segdata)
grd <- GridTopology(cellcentre.offset=c(0.5,0.5),
cellsize=c(1,1), cells.dim=c(10,10))
grd.sp <- as.SpatialPolygons.GridTopology(grd)
pd <- par()
par(mfrow = c(2, 4), mar = c(0, 1, 0, 1))
for (i in 1:8) {
full <- segdata[,(2*i)-1] == 100
half <- segdata[,(2*i)-1] == 50
plot(grd.sp)
plot(grd.sp[full,], col = "Black", add = TRUE)
if (any(half))
plot(grd.sp[half,], col = "Grey", add = TRUE)
text(5, 11.5, labels = paste("Pattern", LETTERS[i]))
}
par(mfrow = pd$mfrow, mar = pd$mar)
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