fourclass {evclust}

Synthetic four-class dataset

Description

A synthetic dataset with two attributes and four classes of 100 points each, generated from a multivariate t distribution with five degrees of freedom and centered, respectively, on [0;0], [0;4], [4;0] and [4;4].

Usage

data(fourclass)

Format

A data frame with three variables: x1, x2 and y (the true class).

References

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(fourclass)
plot(fourclass$x1,fourclass$x2,xlab=expression(x[1]),ylab=expression(x[2]),
col=fourclass$y,pch=fourclass$y)