tintoodiel | R Documentation |
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).
data(tintoodiel)
tintoodiel
is a list with the following components:
a data frame that contains spatial coordinates of the 52 sites
a data frame with 12 columns (concentration of heavy metals) and 52 rows (sites)
the neighbourhood graph of the 52 sites (an object of class nb
)
Borrego, J., Morales, J.A., de la Torre, M.L. and Grande, J.A. (2002) Geochemical characteristics of heavy metal pollution in surface sediments of the Tinto and Odiel river estuary (south-western Spain). Environmental Geology, 41, 785–796.
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))
}
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