An Island Grouping Genetic Algorithm for Fuzzy Partitioning Problems

Table 2

Comparison of the results (in terms of the number of clusters finally found and as a function of the Rand index) obtained by the proposed GGA algorithm with MDB, XB, and FS indexes, respectively, with the previous GGA in [38] and the FCM algorithm in the first synthetic clustering problem considered.

Algorithm	Number of clusters	Rand index
Proposed GGA (MDB index)	8	0.9937
Proposed GGA (XB index)	8	0.9805
Proposed GGA (FS index)	9	0.9874
GGA from [38] (MDB index)	8	0.9918
GGA from [38] (XB index)	8	0.9785
GGA from [38] (FS index)	9	0.9847
FCM	8	0.9712