These data are used in the book "Computational Statistics" 
by G.H. Givens and J.A. Hoeting.

Name: manifold.dat
Chapter: 10
Discussed in: Problem 10.5

Description: 5000 points (one per row) drawn from a four-dimensional mixture
distribution, with a low weighting of a density that lies nearly on a
3-dimensional manifold and a high weighting of a heavy-tailed density
that fills 4-dimensional space.

Variable labels: x1, x2, x3, x4