Table 3. Statistical errors for ADMIXTURE and sNMF on simulated data sets.

Ancestry estimation	Dir(1, 1, 1)	Dir(0.5, 0.5, 0.5)	Dir(0.1, 0.1, 0.1)	Dir(0.2, 0.2, 0.05)	Dir(0.2, 0.2, 0.5)	Dir(0.05, 0.05, 0.01)
Q matrix
ADMIXTURE	0.023	0.012	0.004	0.006	0.010	0.003
sNMF α = 0	0.020	0.011	0.007	0.007	0.013	0.009
sNMF α = 100	0.024	0.014	0.006	0.006	0.014	0.006
G matrix
ADMIXTURE	0.029	0.022	0.016	0.022	0.022	0.022
sNMF α = 0	0.034	0.027	0.021	0.028	0.028	0.028
sNMF α = 100	0.034	0.027	0.021	0.028	0.028	0.028

Dir: Dirichlet distribution used to simulate “true” admixture coefficients, using three ancestral populations.