Table 2. Clustering performance (%) of Kmeans and KMSR on the benchmark data sets.

Acc			NMI		Purity
Data Sets	Kmeans	KMSR	Kmeans	KMSR	Kmeans	KMSR
ecoli	65.50 ± 6.85	84.56 ± 0.22	58.70 ± 2.27	61.47 ± 0.35	78.46 ± 1.50	84.56 ± 0.22
abalone	51.55 ± 0.39	53.63 ± 0.37	13.23 ± 0.63	15.64 ± 0.10	53.50 ± 0.03	54.20 ± 0.10
scale	55.31 ± 5.66	64.93 ± 0.51	17.42 ± 8.74	34.65 ± 1.34	69.72 ± 5.33	77.95 ± 1.05
COIL20	56.06 ± 4.94	72.81 ± 0.05	70.51 ± 2.18	80.26 ± 0.22	59.64 ± 4.34	74.55 ± 0.34
umist	39.51 ± 2.07	51.04 ± 0.12	58.33 ± 1.80	65.09 ± 0.20	46.51 ± 1.54	57.39 ± 0.49
AT&T	52.94 ± 4.21	63.10 ± 1.80	73.06 ± 2.51	78.34 ± 0.50	61.25 ± 3.41	67.85 ± 2.00
YaleB	8.49 ± 0.70	23.14 ± 0.62	10.46 ± 1.00	41.70 ± 0.71	9.22 ± 0.73	24.25 ± 0.79
Yale	39.09 ± 4.61	44.48 ± 2.04	45.19 ± 3.61	49.13 ± 1.60	41.36 ± 3.92	46.06 ± 1.29
PIE	33.56 ± 1.97	92.38 ± 0.91	66.40 ± 0.92	98.13 ± 0.22	39.22 ± 1.27	94.45 ± 0.57
AR	15.25 ± 0.31	33.48 ± 1.06	48.43 ± 0.65	62.38 ± 0.86	16.18 ± 0.39	37.40 ± 1.04
MNIST	52.04 ± 3.16	56.17 ± 0.31	49.83 ± 1.93	50.83 ± 0.00	55.83 ± 2.63	57.50 ± 0.00
jaffe	27.88 ± 2.92	34.91 ± 1.33	12.51 ± 3.02	17.25 ± 1.35	29.62 ± 3.38	35.94 ± 1.22