granulo {ade4} | R Documentation

## Granulometric Curves

### Description

This data set gives the repartition in diameter classes of deposit samples.

### Usage

    data(granulo)

### Format

`granulo` is a list of 2 components.

tab
  contains the 49 deposit samples, 9 diameter classes, weight of grains by size class
born
  contains the boundaries of the diameter classes

### Source

Gaschignard-Fossati, O. (1986) Répartition spatiale des macroinvertébrés benthiques d'un bras vif du Rhône. Rôle des crues et dynamique saisonnière. Thèse de doctorat, Université Lyon 1.

### Examples

    data(granulo)
    w <- t(apply(granulo$tab, 1, function (x) x / sum(x)))
    w <- data.frame(w)
    wtr <- data.frame(t(w))
    wmoy <- data.frame(matrix(apply(wtr, 1, mean), 1))
    d1 <- dudi.pca(w, scal = FALSE, scan = FALSE)
    wmoy <- suprow.default(d1, wmoy)$lisup
    s.arrow(d1$c1, clab = 1.5)
    s.distri(d1$c1, wtr, cstar = 0.33, cell = 0,
        axesell = FALSE, add.p = TRUE, clab = 0.75)
    s.label(wmoy, cpoi = 5, clab = 0, add.p = TRUE)

[Package Contents]