snails: Dataset - Growth rates of snails on large boulders on...

In GAD: GAD: Analysis of variance from general principles

Description

This design was extracted from Underwood (1997) but data are artificial. Snails were transplanted from origin to different shores. Several boulders were used on each shore. Cages with snail of each origin on each boulder were replicated. All factors (origin, shore, boulder and cage) are random.

Usage

data(snails)

Format

A data frame with 240 observations on the following 6 variables.

origin

a random factor with levels O1 O2

shore

a random factor with levels S1 S2 S3 S4 orthogonal to origin

boulder

a random factor with levels B1 B2 B3 nested in shore

cage

a random factor with levels C1 C2 nested in the combination of boulder and origin

replicate

Sample size

growth

response variable

References

Underwood, A.J. 1997. Experiments in Ecology: Their Logical Design and Interpretation Using Analysis of Variance. Cambridge University Press, Cambridge.

Examples

data(snails)

Example output

Loading required package: matrixStats
Loading required package: R.methodsS3
R.methodsS3 v1.7.1 (2016-02-15) successfully loaded. See ?R.methodsS3 for help.

GAD documentation built on May 2, 2019, 3:01 a.m.