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Plots of the first two eigenvectors for some African populations in the CEPH–HGDP dataset [30]. Yoruba and Bantu-speaking populations are genetically quite close and were grouped together. The Mandenka are a West African group speaking a language in the Mande family [15, p. 182]. The eigenanalysis fails to find structure in the Bantu populations, but separation between the Bantu and Mandenka with the second eigenvector is apparent.
