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, pp. 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.