farms data frame has 20 rows and 4 columns. The rows are farms
on the Dutch island of Terschelling and the columns are factors
describing the management of grassland.
This data frame contains the following columns:
Five levels of soil moisture – level 3 does not occur at these 20 farms.
Grassland management type (
SF = standard,
BF = biological,
HF = hobby farming,
NM = nature conservation).
Grassland use (
U1 = hay production,
U3 = grazing).
Manure usage – classes
J.C. Gower and D.J. Hand (1996) Biplots. Chapman & Hall, Table 4.6.
Quoted as from:
R.H.G. Jongman, C.J.F. ter Braak and O.F.R. van Tongeren (1987) Data Analysis in Community and Landscape Ecology. PUDOC, Wageningen.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
farms.mca <- mca(farms, abbrev = TRUE) # Use levels as names eqscplot(farms.mca$cs, type = "n") text(farms.mca$rs, cex = 0.7) text(farms.mca$cs, labels = dimnames(farms.mca$cs)[], cex = 0.7)