The file contains patterns of sonar signals bounced off a metal cylinder or bounced off a roughly cylindrical rock at various angles and under various conditions. The transmitted sonar signal is a frequency-modulated chirp, rising in frequency.
sonarA data frame containing 208 rows and 60 columns.
Number in the range 0.0 to 1.0 that represents the energy within a particular frequency band, integrated over a certain period of time.
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Criterion: Did a sonar signal bounce off a metal cylinder (or a rock)?
Values: TRUE (metal cylinder) vs. FALSE (rock) (53.37% vs.\ 46.63%).
We made the following enhancements to the original data for improved usability:
The binary factor criterion variable with exclusive "m" and "r" values was converted to a logical TRUE/FALSE vector.
Other than that, the data remains consistent with the original dataset.
Gorman, R. P., and Sejnowski, T. J. (1988). Analysis of hidden units in a layered network trained to classify sonar targets. Neural Networks, 1, pp. 75--89.
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