cluster (version 2.0.5)

animals: 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'.

Source

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

Details

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

References

see Struyf, Hubert & Rousseeuw (1996), in agnes.

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)