R: Proportions of sand, silt and clay in sediments specimens

Sediments {compositions} | R Documentation

## Proportions of sand, silt and clay in sediments specimens

### Description

Data provide sand, silt and clay compositions of 21 sediments specimens, 10 of which are identified as offshore, 7 as near shore and 4 new samples.

### Usage

    data(Sediments)

### Format

- sandnumeric: the portion of sand

- siltnumeric: the protion of silt

- claynumeric: the portion of clay

- typenumeric: 1 for offshore, 2 for near shore and 3 for new samples

### Details

The data comprise 21 cases: 10 offshore, 7 near shore and 4 new samples, and 4 variables: sand, silt and clay proportions and in addition the type of sediments specimens – 1 for offshore, 2 for near shore and 3 for new samples.

All 3-part compositions sum to one.

### Note

Courtesy of J. Aitchison

### Source

Aitchison: CODA microcomputer statistical package, 1986, the file name YATQUAD.DAT, here included under the GNU Public Library Licence Version 2 or newer.

### References

Aitchison, J. (1986) The Statistical Analysis of Compositional Data, (Data 20) pp17.

[Package compositions version 2.0-2 Index]