ringnorm
OpenML dataset with id 1496
Author name not available (Why is that?)
Full work available at URL: https://api.openml.org/data/v1/download/1592288/ringnorm.arff
Upload date: 25 May 2015
Dataset Characteristics
Number of classes: 2
Number of features: 21 (numeric: 20, symbolic: 1 and in total binary: 1 )
Number of instances: 7,400
Number of instances with missing values: 0
Number of missing values: 0
Author: Michael Revow Source: http://www.cs.toronto.edu/~delve/data/ringnorm/desc.html Please cite:
1: Abstract:
This is a 20 dimensional, 2 class classification problem. 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).
2: Data set description.
This is an implementation of Leo Breiman's ringnorm example[1]. 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%.
- Type. Classification
- Origin. Laboratory
- Instances. 7400
- Features. 20
- Classes. 2
- Missing values. No
3: Attributes information
@relation ring
@attribute A1 real [-6879.0, 6285.0]
@attribute A2 real [-7141.0, 6921.0]
@attribute A3 real [-7734.0, 7611.0]
@attribute A4 real [-6627.0, 7149.0]
@attribute A5 real [-7184.0, 6383.0]
@attribute A6 real [-6946.0, 6743.0]
@attribute A7 real [-7781.0, 6285.0]
@attribute A8 real [-6882.0, 6357.0]
@attribute A9 real [-7184.0, 7487.0]
@attribute A10 real [-7232.0, 6757.0]
@attribute A11 real [-7803.0, 7208.0]
@attribute A12 real [-7395.0, 6791.0]
@attribute A13 real [-7096.0, 6403.0]
@attribute A14 real [-7472.0, 7261.0]
@attribute A15 real [-7342.0, 7372.0]
@attribute A16 real [-7121.0, 6905.0]
@attribute A17 real [-7163.0, 7175.0]
@attribute A18 real [-8778.0, 6896.0]
@attribute A19 real [-7554.0, 5726.0]
@attribute A20 real [-6722.0, 7627.0]
@attribute Class {0, 1}
@inputs A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20
@outputs Class
This page was built for dataset: ringnorm
