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Table 4:
Comparison of the performances of instance and feature selection methods in terms of the testing error and the storage requirements. The table shows the win/loss record of each algorithm in the column against the algorithm in the row, the p-value of a two-tailed sign test on the win/loss record, ps, and the R+ and R values and p-value of the Wilcoxon test, pw. Significant differences at a confidence level of 95% are marked with a tick (✓).
Compared MethodIMOEAMemetic IS+FS
Testing error    
 CHC IS+FS win/loss 23/31 37/15 
 ps 0.3409 0.0032 ✓ 
 R+/R 1,034.5/505.5 380.5/1,159.5 
 pw 0.0267 ✓ 0.0011 ✓ 
 IMOEA win/loss  45/7 
 ps  0.0000 ✓ 
 R+/R  150.5/1,389.5 
 pw  0.0000 ✓ 
Storage requirements    
 CHC IS+FS win/loss 28/27 48/7 
 ps 1.0000 0.0000 ✓ 
 R+/R 829.0/711.0 152.0/1,388.0 
 pw 0.6211 0.0000 ✓ 
 IMOEA win/loss  38/17 
 ps  0.0065 ✓ 
 R+/R  342.5/1,197.5 
 pw  0.0003 ✓ 
Compared MethodIMOEAMemetic IS+FS
Testing error    
 CHC IS+FS win/loss 23/31 37/15 
 ps 0.3409 0.0032 ✓ 
 R+/R 1,034.5/505.5 380.5/1,159.5 
 pw 0.0267 ✓ 0.0011 ✓ 
 IMOEA win/loss  45/7 
 ps  0.0000 ✓ 
 R+/R  150.5/1,389.5 
 pw  0.0000 ✓ 
Storage requirements    
 CHC IS+FS win/loss 28/27 48/7 
 ps 1.0000 0.0000 ✓ 
 R+/R 829.0/711.0 152.0/1,388.0 
 pw 0.6211 0.0000 ✓ 
 IMOEA win/loss  38/17 
 ps  0.0065 ✓ 
 R+/R  342.5/1,197.5 
 pw  0.0003 ✓ 
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