ArcticLake {compositions} | R Documentation

## Artic lake sediment samples of different water depth

### Description

Sand, silt and clay compositions of 39 sediment samples of different water depth in an Arctic lake.

### Usage

    data(ArcticLake)

### Details

Sand, silt and clay compositions of 39 sediment samples at different water depth (in meters) in an Arctic lake. The additional feature is a concomitant variable or {em covariate,/} water depth, which may account for some of the variation in the compositions. In statistical terminology we have a multivariate regression problem with sediment composition as regressand and water depth as regressor.

All row percentage sums to 100, except for rounding errors.

### Source

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

### References

Aitchison: The Statistical Analysis of Compositional Data, 1986, Data 5, pp5.

[Package compositions version 0.91-6 Index]