# Outlier Detection Based Feature Selection Exploiting Bio-Inspired Optimization Algorithms
## 7 Experimentation Results
### Projection-Pursuit-Based Feature-Selection Techniques
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Dataset** & **Proposed PPFS** & **Feature Number (Frequency)** & **Outliers Number** & **Time** \\ \hline \multirow{4}{*}{Breast Cancer} & PPFS-GAF & 1(97), 3(80), 6(81), 10(81) & 4 & 245 ms \\  & PPFS-GAK & 1(97) & 1 & 130 ms \\  & PPFS-TF & 1(97) & 1 & 497 ms \\  & PPFS-TK & 1(97) & 1 & 401 ms \\ \hline \multirow{4}{*}{Liver disorder} & PPFS-GAF & 1(100), 2(78), 6(99) & 3 & 82 ms \\  & PPFS-GAK & 1(100), 6(100) & 2 & 42 ms \\  & PPFS-TF & 1(98), 2(63), 6(87) & 3 & 164 ms \\  & PPFS-TK & 1(98), 6(98) & 2 & 115 ms \\ \hline \multirow{4}{*}{Sonar} & PPFS-GAF & 1(96), 2(94), 3(91), 19(75), 20(98), 21-29(100), 30(97), 49(84), & 27 & 359 ms \\  & & 50–52(97), 53–55(98), 56–60(99) & & \\ \cline{2-5}  & PPFS-GAK & 1(100), 2(97), 3(72), 20(96), 21–29(100), 30(98), 50–60(100) & 24 & 115 ms \\ \cline{2-5}  & PPFS-TF & 1(94), 2(90), 3(79), 4(51), 19(57), 20(79), 21(89), 22(91), & \\ \cline{2-5}  & PPFS-TF & 23(95), 24(96), 25(97), 26(99), 27(100), 28(100), 29(95), 30(89), & 23 & 510 ms \\  & & 49(80), 50–60(98) & & \\ \cline{2-5}  & PPFS-TK & 1(88), 2(73), 20(67), 21(90), 22(97), 23–25(100), 26(99), 27(100), & \\  & & 28(99), 29(98), 30(90), 50(91), 51(94), 52(95), 53–60(95) & & 23 & 207 ms \\ \hline \multirow{4}{*}{Wine} & PPFS-GAF & 4(64), 5(64), 13(98) & 3 & 82 ms \\  & PPFS-GAK & 13(100) & 1 & 32 ms \\  & PPFS-TF & 13(98) & 1 & 162 ms \\  & PPFS-TK & 13(100) & 1 & 79 ms \\ \hline \multirow{4}{*}{Spam} & PPFS-GAF & 5(60), 16(54), 21(52), 26(56), 46(52), 55(50) & 6 & 7 s 13 ms \\ \cline{2-5}  & PPFS-GAK & 57(100) & 1 & 3 s 259 ms \\ \cline{2-5}  & PPFS-TF & 2(55), 19(53), 21(56), 27(67), 42(52), 45(61), 46(53), 55(53), & 10 & 8 s 14 ms \\  & PPFS-TF & 56(57), 57(60) & 2 & 3 s 241 ms \\ \hline \multirow{4}{*}{Waveform} & PPFS-GAF & 1(84), 2(75), 10(88), 11(88), 20(80), 21(91) & 7 & 3 s 758 ms \\  & PPFS-GAK & 1(76), 2(64), 10(13), 11(75), 12(63), 13(35), 20(59), 21(78) & 8 & 1 s 627 ms \\  & PPFS-TF & 1(79), 2(63), 10(83), 11(90), 12(71), 20(64), 21(79) & 7 & 5 s 1 ms \\  & PPFS-TK & 1(71), 10(52), 11(71), 12(55), 15(50), 21(74) & 6 & 2 s 759 ms \\ \hline \multirow{4}{*}{Vehicle} & PPFS-GAF & 6(100), 12(100), 15–16(100) & 4 & 95 ms \\  & PPFS-GAK & 6(100), 12(100), 15–16(100) & 4 & 34 ms \\  & PPFS-TF & 6(100), 9(62), 12(100), 15–16(100) & 5 & 182 ms \\  & PPFS-TK & 6(100), 12(100), 15–16(100) & 4 & 114 ms \\ \hline \multirow{4}{*}{Diabetes} & PPFS-GAF & 1(90), 2(95), 5(84), 7(94) & 4 & 232 ms \\  & PPFS-GAK & 2(100), 7(100) & 2 & 127 ms \\  & PPFS-TF & 1(93), 2(99), 56(87), 7(97) & 4 & 451 ms \\  & PPFS-TK & 29(87), 7(86) & 2 & 351 ms \\ \hline \multirow{4}{*}{Ionosphere} & PPFS-GAF & 1(98), 8(57), 13(50), 14(56), 15(60), 17(51), 18(71), 20(85), 24(65), & \\  & & 26(67), 27(52), 28(58) & 12 & 310 ms \\ \cline{2-5}  & PPFS-GAK & 1(98), 3(81), 5(84), 7(73), 9(58), 20(65), 24(66), 26(50), 28(67) & 9 & 133 ms \\ \cline{2-5}  & PPFS-TF & 1(81), 8(51), 10(54), 13(59), 14(51), 15(65), 17(57), 18(162), 19(56), & 14 & 420 ms \\ \cline{2-5}  & PPFS-TF & 20(63), 21(52), 24(65), 26(53), 28(55) & & 206 ms \\ \cline{2-5}  & PPFS-TK & 1(98), 3(86), 5(77), 7(57), 24(55), 28(62) & 6 & 206 ms \\ \hline \multirow{4}{*}{Climate} & PPFS-GAF & 1(81) & 1 & 257 ms \\  & PPFS-GAK & 29(3), 3(100) & 2 & 112 ms \\  & PPFS-TF & 2(88), 3(92) & 2 & 398 ms \\  & PPFS-TK & 2(82), 3(100) & 2 & 398 ms \\ \hline \multirow{4}{*}{WDBC} & PPFS-GAF & 2(53), 3(73), 4(68), 14(70), 22(64), 23(74), 24(66) & 7 & 386 ms \\  & PPFS-GAK & 4(100), 24(100) & 2 & 163 ms \\  & PPFS-TF & 4(85), 24(86) & 2 & 574 ms \\  & PPFS-TK & 4(100), 24(86) & 2 & 267 ms \\ \hline \multirow{4}{*}{Australian} & PPFS-GAF & 2(86), 3(81) & 2 & 247 ms \\  & PPFS-GAK & 2(100), 3(600) & 2 & 136 ms \\  & PPFS-TF & 2(99) & 1 & 386 ms \\  & PPFS-TK & 2(98) & 1 & 229 ms \\ \hline \multirow{4}{*}{Stock} & PPFS-GAF & 3(91), 5(80), 7(88), 8(82) & 4 & 213 ms \\  & PPFS-GAK & 3(100), 5(99), 6(94), 7(100), 8(100) & 5 & 114 ms \\ \cline{1-1}  & PPFS-TF & 3(98), 5(97), 7(99), 8(95) & 4 & 339 ms \\ \cline{1-1}  & PPFS-TK & 3(99), 5(83), 6(78), 7(100), 8(89) & 5 & 193 ms \\ \hline \hline \end{tabular}
\end{table}