Colours of Eyes and Hair of People in Caithness

Data on the cross-classification of people in Caithness, Scotland, by eye and hair colour. The region of the UK is particularly interesting as there is a mixture of people of Nordic, Celtic and Anglo-Saxon origin.

caith

Format

A 4 by 5 table with rows the eye colours (blue, light, medium, dark) and columns the hair colours (fair, red, medium, dark, black).

Source

Fisher, R.A. (1940) The precision of discriminant functions. Annals of Eugenics (London) 10, 422–429.

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

Examples

## IGNORE_RDIFF_BEGIN
## The signs can vary by platform
corresp(caith)
#> First canonical correlation(s): 0.4463684 
#> 
#>  Row scores:
#>        blue       light      medium        dark 
#>  0.89679252  0.98731818 -0.07530627 -1.57434710 
#> 
#>  Column scores:
#>        fair         red      medium        dark       black 
#>  1.21871379  0.52257500  0.09414671 -1.31888486 -2.45176017 
## IGNORE_RDIFF_END
dimnames(caith)[[2]] <- c("F", "R", "M", "D", "B")
par(mfcol=c(1,3))
plot(corresp(caith, nf=2)); title("symmetric")
plot(corresp(caith, nf=2), type="rows"); title("rows")
plot(corresp(caith, nf=2), type="col"); title("columns")

par(mfrow=c(1,1))