butterfly {evclust}

Butterfly dataset

Description

A toy dataset used to illustrate fuzzy and evidential clustering algorithms. Also called the 'Diamond' dataset. Adapted from Windham (1985), with one outlier added.

Usage

data(butterfly)

Format

A matrix with 12 rows and 2 column.

References

M.P. Windham. Numerical classification of proximity data with assignment measures. Journal of classification, 2:157-172, 1985.

M.-H. Masson and T. Denoeux. ECM: An evidential version of the fuzzy c-means algorithm. Pattern Recognition, Vol. 41, Issue 4, pages 1384-1397, 2008.

Examples

data(butterfly)
plot(butterfly[,1],butterfly[,2],xlab=expression(x[1]),ylab=expression(x[2]))