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

Table 11

Results of the IT2XB 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	0.05604	0.04877	0.06331	0.05656	0.04870	0.06442
	3	0.13410	0.11048	0.15772	0.13778	0.11084	0.16472
	4	0.18766	0.14543	0.22990	0.19211	0.14687	0.23736
	5	0.22753	0.16904	0.28602	0.23302	0.17094	0.29509
	6	0.29483	0.21162	0.37804	0.30525	0.21204	0.39846
	7	0.31905	0.23313	0.40497	0.33896	0.23724	0.44067
	8	0.23901	0.17431	0.30371	0.24926	0.17482	0.32369
	9	0.39515	0.27792	0.51239	0.55028	0.38453	0.71604
	10	0.34780	0.23825	0.45735	0.35965	0.24133	0.47796