Table 3. Estimations of number of clusters by the relative measures.

	Relative measures
Data sets	Dunn	Sil	PBM	Hubert	Normalized Hubert	DB	SD	S_Dbw	CS	C-index	#Cluster
Breast cancer	5	2	2	2	2	10	2	10	2	5	2
Breast tissue	3	2	6	2	2	3	2	7	6	10	6
Acute inflammations	4	2	9	2	2	10	4	10	9	4	2
Ecoli	3	2	3	2	2	10	4	7	4	4	8
Glass	2	2	2	2	2	2	2	10	8	2	6
Haberman’s survival	8	2	5	2	2	10	4	10	4	10	2
Ionosphere	2	2	2	2	3	10	2	9	9	10	2
Iris	2	2	2	2	2	2	2	10	2	2	3
Parkinsons	3	3	5	2	2	8	3	9	8	10	2
Pima Indians diabetes	2	2	4	2	2	10	3	10	10	10	2
Sonar	4	2	2	2	2	10	4	10	4	4	2
Transfusion	9/10	2	7	2	2	2	2	10	7	9	2
Wine	6	3	3	2	2	3	2	7	3	6	3
Wine quality (red)	2	2	3	2	2	9	3	3	3	9	6
Yeast	9/10	2	2	2	2	10	3	9	10	10	10