Clustering Directions Based on the Estimation of a Mixture of Von Mises-Fisher Distributions

Table 3: Final partitions, size groups, estimates of the concentration parameters and estimate of the angle between the mean directions.

Algorithm	Group	Final Partition	n_i
Soft-movMF	1	9,10,11,12,14,15,16,23,24,30	10	21.5	33.3
Soft-movMF	2	Remaining observations	23	36.65
Hard-movMF	1	9,14,16,24,30	5	22.52	39.9
Hard-movMF	2	Remaining observations	28	26.86
Stochastic EM	1	9,10,11,12,14,15,16,22,23,24,30	11	20.52	31.2
Stochastic EM	2	Remaining observations	22	36.47
Dynamic Clusters	1	1,5,9,10,11,12,13,14,15,16,23,24,29,30	14	13.29	31.3
Dynamic Clusters	2	Remaining observations	19	23.64