This is an implementation of Leo Breiman's ringnorm example. It is a 20 dimensional, 2 class classification example. Each class is drawn from a multivariate normal distribution. Class 1 has mean zero and covariance 4 times the identity. Class 2 has mean (a,a,..a) and unit covariance. a = 2/sqrt(20). Breiman reports the theoretical expected misclassification rate as 1.3%. He used 300 training examples with CART and found an error of 21.4%.
Number of attributes: 21
Number of cases: 7,400
Number of prototasks: 1
Number of methods run on this dataset: 3
Contributed by: Michael Revow.
Last Updated 11 October 1996
Comments and questions to: firstname.lastname@example.org