| condroz | R Documentation |
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.
data(condroz)
A data frame with 428 observations on the following 2 variables.
CaCalcium content of the soil sample
pHpH value of the soil sample
For more information on the dataset, cf. Goegebeur et al. (2005).
Hubert and Vandervieren (2006), p. 10. This dataset is also studied in Vandewalle et al. (2004).
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, Birkhäuser, Basel, p. 367-376.
adjbox(condroz$Ca)