This function is similar to load, but also initializes the different
types of objects that can be used as genotypes in a BGData object.
Currently supported are ff_matrix, big.matrix, and
BEDMatrix objects. If the object is of type LinkedMatrix, all
nodes will be initialized with their appropriate method.
load.BGData(file, envir = parent.frame())
The name of the .RData file to be loaded.
The environment where to load the data.
BGData-class, ff,
big.matrix-class,
BEDMatrix-class, and
LinkedMatrix-class for more information on the
above mentioned classes.