ade4 (version 1.7-23)

tintoodiel: Tinto and Odiel estuary geochemistry

Description

This data set contains informations about geochemical characteristics of heavy metal pollution in surface sediments of the Tinto and Odiel river estuary (south-western Spain).

Usage

data(tintoodiel)

Format

tintoodiel is a list with the following components:

xy

a data frame that contains spatial coordinates of the 52 sites

tab

a data frame with 12 columns (concentration of heavy metals) and 52 rows (sites)

nb

the neighbourhood graph of the 52 sites (an object of class nb)

Examples

data(tintoodiel)
estuary.pca <- dudi.pca(tintoodiel$tab, scan = FALSE, nf = 4)

if(requireNamespace("spdep", quietly = TRUE) & requireNamespace("adespatial", quietly = TRUE)) {
    estuary.listw <- spdep::nb2listw(tintoodiel$nb)
    estuary.pca.ms <- adespatial::multispati(estuary.pca, estuary.listw, scan = FALSE, 
        nfposi = 3, nfnega = 2)
    summary(estuary.pca.ms)
    par(mfrow = c(1, 2))
    barplot(estuary.pca$eig)
    barplot(estuary.pca.ms$eig)
    par(mfrow = c(1, 1))
}