compositions (version 1.10-1)

jura: The jura dataset

Description

A geochemical dataset from the Swiss Jura.

Usage

data(juraset)
data(jura259)

format

A 359x11 or 259x11 dataframe

source

AI-Geostats

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

rll{ 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.

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

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)