irishdata {ade4}R Documentation

Geary's Irish Data

Description

This data set contains geographic informations about 25 counties of Ireland.

Usage

data(irishdata)

Format

irishdata is a list of 5 components.

    area
    is a data frame with polygons for each of the 25 contiguous counties.
    county.names
    is a vector with the names of the 25 counties.
    xy
    is a data frame with the coordinates centers of the 25 counties.
    tab
    is a data frame with 25 rows (counties) and 12 variables.
    contour
    is a data frame with the global polygon of all the 25 counties.

Source

Geary, R.C. (1954) The contiguity ratio and statistical mapping.
The incorporated Statistician, 5, 3, 115–145.

Cliff, A.D. and Ord, J.K. (1973) Spatial autocorrelation, Pion, London. 1–178.

Examples

data(irishdata)
par(mfrow = c(2,2))
area.plot(irishdata$area, lab = irishdata$county.names, clab = 0.75)
area.plot(irishdata$area)
apply(irishdata$contour, 1, function(x) segments(x[1],x[2],x[3],x[4], 
    lwd = 3))
s.corcircle(dudi.pca(irishdata$tab, scan = FALSE)$co)
score <- dudi.pca(irishdata$tab, scan = FALSE, nf = 1)$li$Axis1
names(score) <- row.names(irishdata$tab)
area.plot(irishdata$area, score)

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