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Table 4 Average percentage of features (and their corresponding standard deviation) used by k NN with different parameters on four microarray data sets (%)

From: Selecting subsets of newly extracted features from PCA and PLS in microarray data analysis

DATASET PCAKNN GAPCAKNN PLSKNN GAPLSKNN PPKNN GAPPKNN
k = 1 for k NN
CNS 68.5(6.5) 32.3(8.0) 69.2(8.0) 32.2(6.4) 62.5(7.3) 32.3(9.1)
COLON 78.2(4.4) 29.7(7.8) 58.3(5.2) 32.8(6.4) 61.4(9.0) 34.2(7.2)
LEUKEMIA 68.0(8.8) 28.6(6.2) 47.8(7.1) 31.2(7.6) 54.3(8.3) 33.3(6.8)
LUNG 73.4(6.2) 72.2(7.6) 78.4(7.2) 68.9(5.9) 79.8(8.1) 71.9(6.9)
Average 72.0(6.5) 40.7(7.4) 63.4(6.9) 41.2(6.6) 64.5(8.2) 42.9(7.5)
k = 4 for k NN
CNS 71.2(6.8) 26.6(7.9) 68.2(7.8) 31.6(9.5) 62.4(9.8) 23.1(8.2)
COLON 80.3(7.5) 32.2(6.8) 59.7(5.2) 27.3(8.3) 62.3(8.8) 32.5(7.5)
LEUKEMIA 81.4(6.9) 26.7(5.7) 46.8(8.8) 35.5(7.1) 50.7(7.3) 33.2(6.0)
LUNG 78.2(8.7) 71.2(6.3) 74.7(6.0) 69.3(4.1) 80.2(8.9) 70.0(6.2)
Average 77.7(7.5) 39.1(6.7) 62.3(6.9) 40.9(7.2) 63.9(8.7) 39.7(7.0)
k = 7 for k NN
CNS 72.8(7.1) 29.4(8.2) 61.7(8.8) 32.3(6.1) 68.1(10.3) 32.0(8.8)
COLON 81.2(8.3) 25.7(7.7) 52.4(6.3) 36.7(5.7) 65.4(8.9) 33.4(7.3)
LEUKEMIA 79.1(6.9) 28.9(6.5) 48.9(9.1) 32.1(6.8) 51.3(9.1) 32.7(6.1)
LUNG 80.0(5.2) 72.5(8.7) 78.3(7.4) 62.9(7.6) 82.7(9.2) 80.9(5.8)
Average 78.2(6.9) 39.1(7.8) 60.3(7.9) 41.0(6.6) 66.8(9.4) 44.7(7.0)