robustbase (version 0.92-5)

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

utf8

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

See also those for adjbox.

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.

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, Birkhäuser, Basel, p. 367-376.

Examples

adjbox(condroz$Ca)