Table 1.

Datasets used in experiments

Name	Instances	Dimensions	Classes	Imbalance
MNIST (41)	70,000	784	10	$\sim$1
Coil-100 (45)	7,200	49,152	100	1
YaleB (43)	2,414	32,256	38	1
YTF (44)	10,036	9,075	40	13
Reuters-21578	9,082	2,000	50	785
RCV1 (38)	10,000	2,000	4	6
Pendigits (42)	10,992	16	10	$\sim$1
Shuttle	58,000	9	7	4,558
Mice Protein (39)	1,077	77	8	$\sim$1

For each dataset, the number of instances, number of dimensions, number of ground-truth clusters, and the imbalance, defined as the ratio of the largest and smallest cardinalities of ground-truth clusters, are shown.