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Table 3 Statistical classification error rates (and their corresponding standard deviation) by using k NN with different different parameters on four microarray data sets (%)

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

DATASET KNN PCAKNN GAPCAKNN PLSKNN GAPLSKNN PPKNN GAPPKNN
k = 1 for k NN
CNS 47.5(3.5) 43.8(8.7) 40.8(10.2) 44.9(9.3) 36.4(10.7) 44.9(10.3) 34.3(8.3)
COLON 32.5(1.4) 28.4(8.4) 27.1(10.3) 24.8(14.3) 21.9(7.5) 30.2(12.2) 18.2(7.2)
LEUKEMIA 16.1(2.2) 14.7(10.8) 11.4(8.7) 15.7(10.4) 12.3(8.6) 15.9(11.9) 8.4(6.4)
LUNG 17.6(2.3) 11.8(7.1) 11.0(4.6) 11.8(5.3) 6.1(4.7) 13.2(5.6) 7.8(4.1)
Average 28.4(2.3) 24.6(8.7) 22.57(8.4) 24.3(9.8) 19.2(7.8) 25.3(10.0) 17.1(6.5)
k = 4 for k NN
CNS 48.6(1.2) 46.5(11.2) 41.5(11.0) 44.9(9.9) 38.4(10.8) 47.8(9.9) 38.5(8.7)
COLON 44.6(2.8) 42.9(12.9) 36.2(9.2) 35.3(14.3) 28.8(8.8) 34.9(13.7) 24.5(8.4)
LEUKEMIA 32.5(1.9) 31.5(14.1) 28.1(11.9) 15.5(9.6) 14.8(14.9) 18.6(11.5) 10.0(7.8)
LUNG 16.2(0.8) 15.8(4.6) 13.5(4.8) 12.6(6.3) 10.1(4.8) 13.4(6.5) 9.4(3.5)
Average 35.4(1.7) 34.1(10.7) 28.8(9.2) 27.0(10.0) 23.0(8.0) 28.67(10.4) 20.6(7.1)
k = 7 for k NN
CNS 46.5(1.4) 39.1(6.6) 38.6(6.8) 41.4(10.3) 39.4(9.4) 39.0(9.0) 31.9(7.6)
COLON 30.9(1.0) 28.4(8.4) 26.0(8.3) 28.3(11.6) 24.3(8.3) 25.8(11.0) 19.5(7.2)
LEUKEMIA 24.3(1.0) 22.7(10.2) 17.7(9.1) 13.5(9.0) 11.5(8.8) 12.4(8.0) 7.0(6.2)
LUNG 16.3(0.6) 13.2(3.6) 10.1(3.5) 11.5(4.1) 6.5(4.7) 12.1(5.4) 7.5(3.61)
Average 29.5(1.0) 25.8(7.2) 23.1(6.9) 23.6(8.7) 20.4(7.8) 22.42(8.3) 16.4(6.2)