| af | Allele frequencies |
| af_snp | Allele frequencies for SNP |
| centerscale | Matrix centering and scaling |
| hgdp_subset | HGDP subset |
| lfa | Logistic factor analysis |
| pca_af | PCA Allele frequencies |
| sHWE | Hardy-Weinberg Equilibrium in structure populations |
| trunc_svd | Truncated singular value decomposition |