| Feature selection method | Feature subset | Number of features | Selected features |
| SVM-RFE | I | 10 | SS, HT, DR, Bpl, NH, Btr, Bal, Su, SA, Lpd | II | 13 | HT, RP, SS, Ta1, Btr, BO, Dp, Di, Td, Fr, DR, Bar, NH | III | 12 | HT, FD, SS, DR, Btr, Dp, Di, Fr, BO, Td, Su, Ty | IV | 14 | HT, RP, SS, Ta2, Btr, Di, Dp, Fr, BO, Td, SA, Vo, Ta1, TS | V | 15 | HT, Lpd, SS, Bpl, Btr, Bal, NH, Ta1, Su, Di, SA, Vo, Fr, Ta2, Ty |
| Rough set | I | 13 | , Co, NW, SS, NH, Ty, RP, HT, He, FD, ND, Pa, Btr | II | 13 | , Co, NW, SS, NH, Ty, RP, HT, He, ND, Pa, FD, Btl | III | 11 | , RP, NW, Ty, NH, SS, Pa, He, HT, ND, FD | IV | 13 | , Pa, NW, SS, NH, Ty, RP, ND, HT, He, Btl, SA, FD | V | 13 | , Pa, NW, SS, Ty, NH, RP, He, HT, ND, Btr, SA, FD |
| BMSF | I | 8 | , RP, NW, PDR, HT, Bar, SS, Ta2 | II | 6 | , Btol, NW, HT, Bar, Ta2 | III | 8 | , Pa, NW, HT, Bar, Ta2, Bal, Lpd | IV | 7 | , Lpd, NW, Pa, PDR, Ta2, HT | V | 8 | , Btr, NW, HT, Bar, Ta2, PDR, SA |
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