An Extension of the Fuzzy Possibilistic Clustering Algorithm Using Type-2 Fuzzy Logic Techniques

Table 10

Results of the IT2PE validation index to Iris Flower dataset clustering using IT2FPCM and IT2FCM algorithm with = [1.5, 2] and = [1.5, 2.5] as parameters.

Dataset	Clusters	IT2FPCM			IT2FCM
		Defuzz	Lower	Upper	Defuzz	Lower	Upper
Iris	2	0.12706	0.10034	0.15378	0.12776	0.10080	0.15472
	3	0.27001	0.21982	0.32020	0.27104	0.22074	0.32134
	4	0.38333	0.30413	0.46252	0.38442	0.30513	0.46370
	5	0.45027	0.34297	0.55758	0.45232	0.34465	0.55999
	6	0.54534	0.42762	0.66305	0.54757	0.42954	0.66560
	7	0.63092	0.49076	0.77108	0.63321	0.49262	0.77379
	8	0.67371	0.51134	0.83607	0.68029	0.51647	0.84411
	9	0.74321	0.56287	0.92354	0.73528	0.53285	0.93771
	10	0.80024	0.60567	0.99480	0.80718	0.61146	1.00291