animals {cluster} | R Documentation

## Attributes of Animals

### Description

This data set considers 6 binary attributes for 20 animals.

### Usage

    data(animals)

### Format

A data frame with 20 observations on 6 variables:

[ , 1] | war | warm-blooded
[ , 2] | fly | can fly
[ , 3] | ver | vertebrate
[ , 4] | end | endangered
[ , 5] | gro | live in groups
[ , 6] | hai | have hair

All variables are encoded as 1 = `no', 2 = `yes'.

### Details

This dataset is useful for illustrating monothetic (only a single variable is used for each split) hierarchical clustering.

### Source

Leonard Kaufman and Peter J. Rousseeuw (1990): Finding Groups in Data (pp 297ff). New York: Wiley.

### References

Anja Struyf, Mia Hubert & Peter J. Rousseeuw (1996): Clustering in an Object-Oriented Environment. Journal of Statistical Software, 1. http://www.stat.ucla.edu/journals/jss/

### Examples

    data(animals)
    apply(animals,2, table) # simple overview

    ma <- mona(animals)
    ma
    ## Plot similar to Figure 10 in Struyf et al (1996)
    plot(ma)

[Package cluster version 1.11.0 Index]