evclass (version 2.0.2)

ionosphere: Ionosphere dataset

Description

This dataset was collected by a radar system and consists of phased array of 16 high-frequency antennas with a total transmitted power of the order of 6.4 kilowatts. The targets were free electrons in the ionosphere. "Good" radar returns are those showing evidence of some type of structure in the ionosphere. "Bad" returns are those that do not. There are 351 instances and 34 numeric attributes. The first 175 instances are training data, the rest are test data. This version of dataset was used by Zouhal and Denoeux (1998).

Usage

data(ionosphere)

Format

A list with two elements:

x

The 351 x 34 object-attribute matrix.

y

A 351-vector containing the class labels.

References

P. M. Murphy and D. W. Aha. UCI Reposition of machine learning databases. [Machine readable data repository]. University of California, Departement of Information and Computer Science, Irvine, CA.

L. M. Zouhal and T. Denoeux. An evidence-theoretic k-NN rule with parameter optimization. IEEE Transactions on Systems, Man and Cybernetics Part C, 28(2):263--271,1998.

Examples

data(ionosphere)
table(vehicles$y)