get a vector of _minor_ allele frequences from a dosage matrix
getMAF(M)
| M | dosage matrix. Assumes SNPs in M coded 0, 1, 2 (requires rounding dosages to integers). M is Nind x Mrow, numeric matrix, with row/columanes to indicate SNP/ind ID |
|---|
vector of _minor_ allele frequencies, names = SNP IDs if in cols of M