Constructing Better Classifier Ensemble Based on Weighted Accuracy and Diversity Measure

Table 6

The classification correct rate (%) of subensembles selected by candidate measures and forward hill-climbing search algorithm using a pairwise t-test at a 95% significance level.

Dataset	WAD	Kappa-Error	GenDiv	Acc-Only	Div-Only	No-Selection
Hepatitis	83.64 ± 1.48	79.7 ± 1.61 (5.69)	76.24 ± 2.1 (9.1)	78.55 ± 2.47 (5.58)	83.82 ± 0.9 (−0.33)	80.76 ± 0.35 (5.98)
Autos	81.1 ± 0.74	83.99 ± 2.75 (−3.21)	71.66 ± 1.77 (15.56)	82.88 ± 2.21 (−2.42)	78.18 ± 0.93 (7.76)	75.61 ± 0.29 (21.84)
Heart-statlog	85.94 ± 2.52	84.72 ± 2.28 (1.13)	82.23 ± 0.71 (4.48)	86.94 ± 2.67 (−0.87)	77.94 ± 1.97 (7.9)	81.3 ± 0.14 (5.81)
Ionosphere	93.61 ± 1.6	93.68 ± 0.12 (−0.14)	93.7 ± 0.58 (−0.17)	90.81 ± 1.18 (4.45)	89.41 ± 1.39 (6.26)	91.72 ± 1.56 (2.67)
Credit-a	91.01 ± 1.07	87.22 ± 0.24 (10.92)	88.96 ± 1.61 (3.35)	87.16 ± 2.09 (5.18)	84.87 ± 0.52 (16.32)	85.62 ± 1.41 (9.62)
Diabetes	83.26 ± 2.64	80.58 ± 1.77 (2.66)	80.42 ± 2.67 (2.39)	75.31 ± 1.56 (8.19)	73.56 ± 2.35 (8.67)	77.54 ± 1.9 (5.56)
Vehicle	81.03 ± 0.31	76.67 ± 0.99 (13.29)	74.12 ± 0.13 (65)	72.45 ± 2.61 (10.32)	71.52 ± 1.84 (16.11)	74.76 ± 2.7 (7.29)
Car	94 ± 0.53	92.16 ± 2.95 (1.94)	93.8 ± 1.22 (0.47)	91.82 ± 2.25 (2.98)	94.97 ± 2.16 (−1.38)	93.7 ± 1.65 (0.54)
cmc	69.02 ± 1.45	51.62 ± 1.98 (22.42)	71.88 ± 0.68 (−5.65)	64.18 ± 2.77 (4.89)	60.48 ± 2.06 (10.72)	53.31 ± 1.58 (23.16)
Segment	97.73 ± 1.67	95.03 ± 2.57 (2.78)	98.98 ± 0.07 (−2.37)	97.26 ± 0.37 (0.86)	91.41 ± 1.37 (9.25)	97.49 ± 1.02 (0.38)
kr-vs-kp	94.99 ± 1.82	96.89 ± 1.28 (−2.71)	94.9 ± 1.86 (0.1)	92.01 ± 2.08 (3.4)	92.52 ± 1.89 (2.97)	95.28 ± 1.78 (−0.37)
Hypothyroid	94.07 ± 0.78	91.04 ± 0.42 (10.81)	89.88 ± 0.81 (11.78)	91.43 ± 2.69 (2.98)	94.72 ± 0.87 (−1.76)	90.4 ± 1.39 (7.28)
Waveform	88.49 ± 1.87	83.23 ± 2.04 (6.01)	81.93 ± 0.47 (10.75)	83.03 ± 2.75 (5.19)	81.27 ± 0.35 (12)	83.6 ± 1.74 (6.05)
Page-blocks	95.93 ± 0.22	90.01 ± 1.11 (16.54)	96.08 ± 0.61 (−0.74)	96.1 ± 0.57 (−0.88)	96.27 ± 0.64 (−1.59)	93.57 ± 2.54 (2.92)
Nursery	94.56 ± 0.26	92.04 ± 2.3 (3.44)	92.81 ± 1.97 (2.78)	90.63 ± 2.82 (4.38)	93.07 ± 0.5 (8.36)	92.41 ± 0.19 (21.11)
Absolute w/l/t		12/3/0	11/4/0	12/3/0	11/4/0	14/1/0
Significant w/l/t		10/2/3	9/2/4	11/1/3	11/0/4	12/0/3