robustbase (version 0.7-6)

condroz: Condroz Data

Description

Dataset with pH-value and Calcium content in soil samples, collected in different communities of the Condroz region in Belgium. The data pertain to a subset of 428 samples with a pH-value between 7.0 and 7.5.

Usage

data(condroz)

encoding

latin1

source

Hubert and Vandervieren (2006), p. 10. This dataset is also studied in Vandewalle et al. (2004).

Details

For more information on the dataset, cf. Goegebeur et al. (2005).

References

Goegebeur, Y., Planchon, V., Beirlant, J., Oger, R. (2005). Quality Assesment of Pedochemical Data Using Extreme Value Methodology, Journal of Applied Science, 5, p. 1092-1102.

Hubert, M. and Vandervieren, E. (2006). An Adjusted Boxplot for Skewed Distributions, Technical Report TR-06-11, KULeuven, Section of Statistics, Leuven. http://wis.kuleuven.be/stat/robust/Papers/TR0611.pdf

Vandewalle, B., Beirlant, J., Hubert, M. (2004). A robust estimator of the tail index based on an exponential regression model, in Hubert, M., Pison G., Struyf, A. and S. Van Aelst, ed., Theory and Applications of Recent Robust Methods, Birkh�user, Basel, p. 367-376.

Examples

adjbox(condroz$Ca)