jura: The jura dataset

In compositions: Compositional Data Analysis

The jura dataset

Description

A geochemical dataset from the Swiss Jura.

Usage

data(juraset)
data(jura259)

Format

A 359x11 or 259x11 dataframe

Details

The JURA data set provided by J.-P. Dubois, IATE-Paedologie, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland. Spatial coordinates and values of categorial and continuous attributes at the 359 sampled sites. The 100 test locartions are denoted with a star. Rock Types: 1: Argovian, 2: Kimmeridgian, 3: Sequanian, 4: Portlandian, 5: Quaternary. Land uses: 1: Forest, 2: Pasture, 3: Meadow , 4: Tillage

	X	X location coordinate
	Y	Y location coordinate
	Rock	Categorical: rocktype,
	Land	Categorical: land usage
	Cd	element amount,
	Cu	element amount,
	Pb	element amount,
	Co	element amount,
	Cr	element amount,
	Ni	element amount,

All 3-part compositions sum to one.

Source

AI-Geostats

References

Atteia, O., Dubois, J.-P., Webster, R., 1994, Geostatistical analysis of soil contamination in the Swiss Jura: Environmental Pollution 86, 315-327

Webster, R., Atteia, O., Dubois, J.-P., 1994, Coregionalization of trace metals in the soil in the Swiss Jura: European Journal of Soil Science 45, 205-218

Examples

## Not run: 
data(juraset)
X <- with(juraset,cbind(X,Y))
comp <- acomp(juraset,c("Cd","Cu","Pb","Co","Cr"))
lrv <- logratioVariogram(comp,X,maxdist=1,nbins=10)
plot(lrv)

## End(Not run)

compositions documentation built on Aug. 21, 2025, 5:33 p.m.