Data from Fisher et al. (1943) giving the number of tokens found for
each of 501 species of butterflies collected in Malaya.
Usage
data(Butterfly)
Arguments
format
A 1-way table giving the number of tokens for 501 species of
butterflies. The variable and its levels are
rll{
No Name Levels
1 nTokens 0, 1, ..., 24
}
source
Michael Friendly (2000),
Visualizing Categorical Data, pages 21--22.
References
R. A. Fisher, A. S. Corbet, C. B. Williams (1943),
The relation between the number of species and the number of
individuals,
Journal of Animal Ecology, 12, 42--58.
M. Friendly (2000),
Visualizing Categorical Data.
SAS Institute, Cary, NC.