| 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
- sand
numeric: the portion of sand
- silt
numeric: the protion of silt
- clay
numeric: the portion of clay
- type
numeric: 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.