This method is run when a '>BGData object is created using
BGData(...) or new("BGData", ...).
# S4 method for BGData
initialize(.Object, geno, pheno, map)A '>geno object that contains genotypes. '>geno is a
class union of several matrix-like types, many of them suitable for very
large datasets. Currently supported are LinkedMatrix::LinkedMatrix,
BEDMatrix::BEDMatrix, bigmemory::big.matrix, ff_matrix,
and matrix.
A data.frame that contains phenotypes. A stub that only
contains an IID column populated with the rownames of @geno will be
generated if missing.
A data.frame that contains a genetic map. A stub that only
contains a mrk column populated with the colnames of @geno will be
generated if missing.