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.

sonar

Format

A data frame containing 208 rows and 60 columns.

V1

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.

V2

(see V1)

V3

(see V1)

V4

(see V1)

V5

(see V1)

V6

(see V1)

V7

(see V1)

V8

(see V1)

V9

(see V1)

V10

(see V1)

V11

(see V1)

V12

(see V1)

V13

(see V1)

V14

(see V1)

V15

(see V1)

V16

(see V1)

V17

(see V1)

V18

(see V1)

V19

(see V1)

V20

(see V1)

V21

(see V1)

V22

(see V1)

V23

(see V1)

V24

(see V1)

V25

(see V1)

V26

(see V1)

V27

(see V1)

V28

(see V1)

V29

(see V1)

V30

(see V1)

V31

(see V1)

V32

(see V1)

V33

(see V1)

V34

(see V1)

V35

(see V1)

V36

(see V1)

V37

(see V1)

V38

(see V1)

V39

(see V1)

V40

(see V1)

V41

(see V1)

V42

(see V1)

V43

(see V1)

V44

(see V1)

V45

(see V1)

V46

(see V1)

V47

(see V1)

V48

(see V1)

V49

(see V1)

V50

(see V1)

V51

(see V1)

V52

(see V1)

V53

(see V1)

V54

(see V1)

V55

(see V1)

V56

(see V1)

V57

(see V1)

V58

(see V1)

V59

(see V1)

V60

(see V1)

mine.crit

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%).

Details

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.

References

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.