Sonar: Sonar, Mines vs. Rocks

Description Usage Format Source References Examples

Description

This is the data set used by Gorman and Sejnowski in their study of the classification of sonar signals using a neural network [1]. The task is to train a network to discriminate between sonar signals bounced off a metal cylinder and those bounced off a roughly cylindrical rock.

Each pattern is a set of 60 numbers in the range 0.0 to 1.0. Each number represents the energy within a particular frequency band, integrated over a certain period of time. The integration aperture for higher frequencies occur later in time, since these frequencies are transmitted later during the chirp.

The label associated with each record contains the letter "R" if the object is a rock and "M" if it is a mine (metal cylinder). The numbers in the labels are in increasing order of aspect angle, but they do not encode the angle directly.

Usage

1

Format

A data frame with 208 observations on 61 variables, all numerical and one (the Class) nominal.

Source

These data have been taken from the UCI Repository Of Machine Learning Databases at

and were converted to R format by Evgenia Dimitriadou.

References

Gorman, R. P., and Sejnowski, T. J. (1988). "Analysis of Hidden Units in a Layered Network Trained to Classify Sonar Targets" in Neural Networks, Vol. 1, pp. 75-89.

Newman, D.J. & Hettich, S. & Blake, C.L. & Merz, C.J. (1998). UCI Repository of machine learning databases [http://www.ics.uci.edu/~mlearn/MLRepository.html]. Irvine, CA: University of California, Department of Information and Computer Science.

Examples

1
2

Example output

       V1                V2                V3                V4         
 Min.   :0.00150   Min.   :0.00060   Min.   :0.00150   Min.   :0.00580  
 1st Qu.:0.01335   1st Qu.:0.01645   1st Qu.:0.01895   1st Qu.:0.02438  
 Median :0.02280   Median :0.03080   Median :0.03430   Median :0.04405  
 Mean   :0.02916   Mean   :0.03844   Mean   :0.04383   Mean   :0.05389  
 3rd Qu.:0.03555   3rd Qu.:0.04795   3rd Qu.:0.05795   3rd Qu.:0.06450  
 Max.   :0.13710   Max.   :0.23390   Max.   :0.30590   Max.   :0.42640  
       V5                V6                V7               V8         
 Min.   :0.00670   Min.   :0.01020   Min.   :0.0033   Min.   :0.00550  
 1st Qu.:0.03805   1st Qu.:0.06703   1st Qu.:0.0809   1st Qu.:0.08042  
 Median :0.06250   Median :0.09215   Median :0.1070   Median :0.11210  
 Mean   :0.07520   Mean   :0.10457   Mean   :0.1217   Mean   :0.13480  
 3rd Qu.:0.10028   3rd Qu.:0.13412   3rd Qu.:0.1540   3rd Qu.:0.16960  
 Max.   :0.40100   Max.   :0.38230   Max.   :0.3729   Max.   :0.45900  
       V9               V10              V11              V12        
 Min.   :0.00750   Min.   :0.0113   Min.   :0.0289   Min.   :0.0236  
 1st Qu.:0.09703   1st Qu.:0.1113   1st Qu.:0.1293   1st Qu.:0.1335  
 Median :0.15225   Median :0.1824   Median :0.2248   Median :0.2490  
 Mean   :0.17800   Mean   :0.2083   Mean   :0.2360   Mean   :0.2502  
 3rd Qu.:0.23342   3rd Qu.:0.2687   3rd Qu.:0.3016   3rd Qu.:0.3312  
 Max.   :0.68280   Max.   :0.7106   Max.   :0.7342   Max.   :0.7060  
      V13              V14              V15              V16        
 Min.   :0.0184   Min.   :0.0273   Min.   :0.0031   Min.   :0.0162  
 1st Qu.:0.1661   1st Qu.:0.1752   1st Qu.:0.1646   1st Qu.:0.1963  
 Median :0.2640   Median :0.2811   Median :0.2817   Median :0.3047  
 Mean   :0.2733   Mean   :0.2966   Mean   :0.3202   Mean   :0.3785  
 3rd Qu.:0.3513   3rd Qu.:0.3862   3rd Qu.:0.4529   3rd Qu.:0.5357  
 Max.   :0.7131   Max.   :0.9970   Max.   :1.0000   Max.   :0.9988  
      V17              V18              V19              V20        
 Min.   :0.0349   Min.   :0.0375   Min.   :0.0494   Min.   :0.0656  
 1st Qu.:0.2059   1st Qu.:0.2421   1st Qu.:0.2991   1st Qu.:0.3506  
 Median :0.3084   Median :0.3683   Median :0.4350   Median :0.5425  
 Mean   :0.4160   Mean   :0.4523   Mean   :0.5048   Mean   :0.5630  
 3rd Qu.:0.6594   3rd Qu.:0.6791   3rd Qu.:0.7314   3rd Qu.:0.8093  
 Max.   :1.0000   Max.   :1.0000   Max.   :1.0000   Max.   :1.0000  
      V21              V22              V23              V24        
 Min.   :0.0512   Min.   :0.0219   Min.   :0.0563   Min.   :0.0239  
 1st Qu.:0.3997   1st Qu.:0.4069   1st Qu.:0.4502   1st Qu.:0.5407  
 Median :0.6177   Median :0.6649   Median :0.6997   Median :0.6985  
 Mean   :0.6091   Mean   :0.6243   Mean   :0.6470   Mean   :0.6727  
 3rd Qu.:0.8170   3rd Qu.:0.8320   3rd Qu.:0.8486   3rd Qu.:0.8722  
 Max.   :1.0000   Max.   :1.0000   Max.   :1.0000   Max.   :1.0000  
      V25              V26              V27              V28        
 Min.   :0.0240   Min.   :0.0921   Min.   :0.0481   Min.   :0.0284  
 1st Qu.:0.5258   1st Qu.:0.5442   1st Qu.:0.5319   1st Qu.:0.5348  
 Median :0.7211   Median :0.7545   Median :0.7456   Median :0.7319  
 Mean   :0.6754   Mean   :0.6999   Mean   :0.7022   Mean   :0.6940  
 3rd Qu.:0.8737   3rd Qu.:0.8938   3rd Qu.:0.9171   3rd Qu.:0.9003  
 Max.   :1.0000   Max.   :1.0000   Max.   :1.0000   Max.   :1.0000  
      V29              V30              V31              V32        
 Min.   :0.0144   Min.   :0.0613   Min.   :0.0482   Min.   :0.0404  
 1st Qu.:0.4637   1st Qu.:0.4114   1st Qu.:0.3456   1st Qu.:0.2814  
 Median :0.6808   Median :0.6071   Median :0.4904   Median :0.4296  
 Mean   :0.6421   Mean   :0.5809   Mean   :0.5045   Mean   :0.4390  
 3rd Qu.:0.8521   3rd Qu.:0.7352   3rd Qu.:0.6420   3rd Qu.:0.5803  
 Max.   :1.0000   Max.   :1.0000   Max.   :0.9657   Max.   :0.9306  
      V33              V34              V35              V36        
 Min.   :0.0477   Min.   :0.0212   Min.   :0.0223   Min.   :0.0080  
 1st Qu.:0.2579   1st Qu.:0.2176   1st Qu.:0.1794   1st Qu.:0.1543  
 Median :0.3912   Median :0.3510   Median :0.3127   Median :0.3211  
 Mean   :0.4172   Mean   :0.4032   Mean   :0.3926   Mean   :0.3848  
 3rd Qu.:0.5561   3rd Qu.:0.5961   3rd Qu.:0.5934   3rd Qu.:0.5565  
 Max.   :1.0000   Max.   :0.9647   Max.   :1.0000   Max.   :1.0000  
      V37              V38              V39              V40        
 Min.   :0.0351   Min.   :0.0383   Min.   :0.0371   Min.   :0.0117  
 1st Qu.:0.1601   1st Qu.:0.1743   1st Qu.:0.1740   1st Qu.:0.1865  
 Median :0.3063   Median :0.3127   Median :0.2835   Median :0.2781  
 Mean   :0.3638   Mean   :0.3397   Mean   :0.3258   Mean   :0.3112  
 3rd Qu.:0.5189   3rd Qu.:0.4405   3rd Qu.:0.4349   3rd Qu.:0.4244  
 Max.   :0.9497   Max.   :1.0000   Max.   :0.9857   Max.   :0.9297  
      V41              V42              V43              V44        
 Min.   :0.0360   Min.   :0.0056   Min.   :0.0000   Min.   :0.0000  
 1st Qu.:0.1631   1st Qu.:0.1589   1st Qu.:0.1552   1st Qu.:0.1269  
 Median :0.2595   Median :0.2451   Median :0.2225   Median :0.1777  
 Mean   :0.2893   Mean   :0.2783   Mean   :0.2465   Mean   :0.2141  
 3rd Qu.:0.3875   3rd Qu.:0.3842   3rd Qu.:0.3245   3rd Qu.:0.2717  
 Max.   :0.8995   Max.   :0.8246   Max.   :0.7733   Max.   :0.7762  
      V45               V46               V47               V48         
 Min.   :0.00000   Min.   :0.00000   Min.   :0.00000   Min.   :0.00000  
 1st Qu.:0.09448   1st Qu.:0.06855   1st Qu.:0.06425   1st Qu.:0.04512  
 Median :0.14800   Median :0.12135   Median :0.10165   Median :0.07810  
 Mean   :0.19723   Mean   :0.16063   Mean   :0.12245   Mean   :0.09142  
 3rd Qu.:0.23155   3rd Qu.:0.20037   3rd Qu.:0.15443   3rd Qu.:0.12010  
 Max.   :0.70340   Max.   :0.72920   Max.   :0.55220   Max.   :0.33390  
      V49               V50               V51                V52          
 Min.   :0.00000   Min.   :0.00000   Min.   :0.000000   Min.   :0.000800  
 1st Qu.:0.02635   1st Qu.:0.01155   1st Qu.:0.008425   1st Qu.:0.007275  
 Median :0.04470   Median :0.01790   Median :0.013900   Median :0.011400  
 Mean   :0.05193   Mean   :0.02042   Mean   :0.016069   Mean   :0.013420  
 3rd Qu.:0.06853   3rd Qu.:0.02527   3rd Qu.:0.020825   3rd Qu.:0.016725  
 Max.   :0.19810   Max.   :0.08250   Max.   :0.100400   Max.   :0.070900  
      V53                V54                V55               V56          
 Min.   :0.000500   Min.   :0.001000   Min.   :0.00060   Min.   :0.000400  
 1st Qu.:0.005075   1st Qu.:0.005375   1st Qu.:0.00415   1st Qu.:0.004400  
 Median :0.009550   Median :0.009300   Median :0.00750   Median :0.006850  
 Mean   :0.010709   Mean   :0.010941   Mean   :0.00929   Mean   :0.008222  
 3rd Qu.:0.014900   3rd Qu.:0.014500   3rd Qu.:0.01210   3rd Qu.:0.010575  
 Max.   :0.039000   Max.   :0.035200   Max.   :0.04470   Max.   :0.039400  
      V57               V58                V59                V60          
 Min.   :0.00030   Min.   :0.000300   Min.   :0.000100   Min.   :0.000600  
 1st Qu.:0.00370   1st Qu.:0.003600   1st Qu.:0.003675   1st Qu.:0.003100  
 Median :0.00595   Median :0.005800   Median :0.006400   Median :0.005300  
 Mean   :0.00782   Mean   :0.007949   Mean   :0.007941   Mean   :0.006507  
 3rd Qu.:0.01043   3rd Qu.:0.010350   3rd Qu.:0.010325   3rd Qu.:0.008525  
 Max.   :0.03550   Max.   :0.044000   Max.   :0.036400   Max.   :0.043900  
 Class  
 M:111  
 R: 97  
        
        
        
        

mlbench documentation built on May 2, 2019, 2:12 p.m.