tintoodiel {ade4} | R Documentation

## 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 containing the following objects :

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)
neig
  : an object of class `neig`

### Source

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.

### Examples

    data(tintoodiel)

    ## Not run:
    if (require(pixmap, quiet = TRUE)){
    estuary.pnm <- read.pnm(system.file("pictures/tintoodiel.pnm",
        package = "ade4"))
    s.label(tintoodiel$xy,pixmap = estuary.pnm, neig = tintoodiel$neig,
        clab = 0, cpoi = 2, cneig = 3, addax = FALSE, cgrid = 0, grid = FALSE)
    }
    ## End(Not run)

    estuary.pca <- dudi.pca(tintoodiel$tab, scan = FALSE, nf = 4)
    if (require(maptools, quiet = TRUE) & require(spdep, quiet = TRUE)) {
    estuary.listw <- nb2listw(neig2nb(tintoodiel$neig))
    estuary.pca.ms <- 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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