An Improved Fuzzy c-Means Clustering Algorithm Based on Shadowed Sets and PSO

Table 3

Performance of FCM, RCM, SCM, SRCM, and SP-FCM on package datasets.

Different indices	Algorithms
	FCM	RCM	SCM	SRCM	SP-FCM
DB index	184.569	159.671	143.194	124.038	107.826
Dunn index	92.647	116.298	125.376	169.422	167.313