Comparison on HapMap Phase 3 dataset. Inferred population membership proportions using (a) Admixture and (b) least-squares with α=1. Each point represents a different individual among the four populations: ASW, CEU, MEX, and YRI. The axes represent the proportion of each individual’s genome originating from each inferred population. The proportion belonging to the third inferred population is given by q3 = 1 - q1 - q2.