lizards: Lizard Count Data

In SMPracticals: Practicals for Use with Davison (2003) Statistical Models

Lizard Count Data

Description

These are data on the structural habitat of two species of lizards in Whitehouse, Jamaica. They comprise observed counts for perch height, perch diameter, insolation, and time of day, for both species. The data can be represented as a 2 x 2 x 2 x 3 x 2 contingency table.

Usage

data(lizards)

Format

A data frame with 48 observations on the following 6 variables.

height

high indicates perch at height 5 or more feet, low indicates perch below 5 feet.

diameter

large indicates perch diameter 2 inches or more, small indicates perch diameter less than 2 inches.

sun

Is the perch in a shady or a sunny location?

time

Time of day when lizard observed: early, late or midday.

species

Species of lizard: grahami or opalinus.

y

Number of lizards seen.

Source

Bishop, Y. M. M., Fienberg, S. E. and Holland, P. W. (1975) Discrete Multivariate Analysis. Cambridge, Mass.: MIT Press. Page 164.

Examples

data(lizards)
## maybe str(lizards) ; plot(lizards) ...

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