VIASCKDE Index: A Novel Internal Cluster Validity Index for Arbitrary-Shaped Clusters Based on the Kernel Density Estimation

Table 2

Used datasets.

Dataset	Type	# of Features	# of data	# of classes	Reference
Half-kernel	Synthetic	2	1000	2	[45]
Two spirals	Synthetic	2	312	3	[45]
Outlier	Synthetic	2	700	4	[45]
Corners	Synthetic	2	2000	4	[45]
Cluster in cluster	Synthetic	2	1012	2	[45]
Crescent full moon	Synthetic	2	1000	2	[45]
Moon	Synthetic	2	514	4	[45]
Face	Synthetic	2	322	4	[46]
Wave	Synthetic	2	287	2	[46]
Aggregation	Synthetic	2	788	7	[47]
Zelnik1	Synthetic	2	622	4	[48]
Zelnik5	Synthetic	2	512	4	[48]
Xclara	Synthetic	2	3000	3	[48]
Banana	Synthetic	2	4811	2	[48]
D2c2sc13	Synthetic	2	588	13	[48]
2sp2glob	Synthetic	2	999	3	[48]
Cure-t1-200n	Synthetic	2	2000	5	[48]
Thyroid	Real	4	215	2	[49]
Fisher iris	Real	4	150	3	[49]
Breast cancer	Real	8	699	2	[49]