heplots (version 1.0-2)

Oslo: Oslo Transect Subset Data

Description

The Oslo data set contains chemical concentrations of 332 samples of different plant species collected along a 120 km transect running through the city of Oslo, Norway. It is a subset of the OsloTransect data provided by the rrcov package.

Usage

data(Oslo)

source

Reimann,C., Arnoldussen, A., Boyd, R., Finne, T.E., Koller, F., Nordgulen, Oe., And Englmaier, P. (2007) Element contents in leaves of four plant species (birch, mountain ash, fern and spruce) along anthropogenic and geogenic concentration gradients, The Science of the Total Environment, 377, 416-433.

Details

The OsloTransect contains 360 observations, with 9 observations per site. Only 7 chemical elements were retained from the 25 contained in the OsloTransect data, and these were all log-transformed, following Todorov and Filzmoser (2009). Only complete cases on these variables were retained, and two lithological types of low frequency were removed, leaving 332 observations.

References

Todorov V. and Filzmoser P. (2009) Robust statistic for the one-way MANOVA, submitted to the Journal of Environmetrics.

Examples

data(Oslo)
table(Oslo$litho)

Oslo.mod <- lm(cbind(Cu, K, Mg, Mn, P, Zn) ~ litho, data=Oslo)
Anova(Oslo.mod)

heplot(Oslo.mod, var=c("Cu", "Mn"))
pairs(Oslo.mod)

if(require(candisc)) {
  Oslo.can <- candisc(Oslo.mod)
  Oslo.can
  heplot(Oslo.can)
  heplot3d(Oslo.can, shade=TRUE, wire=FALSE, alpha=0.5, var.col="red")
}