This function creates a symDMatrix object from a character vector of
path names to RData files, each containing exactly one
ff_matrix object that is used as a block, and is useful for
distributed computing where each block is processed on a different node.
# S3 method for character
as.symDMatrix(x, ...)A character vector with path names to RData files.
Additional arguments (currently unused).
A symDMatrix object.
The RData files must be ordered by block: G11, G12, G13, ...,
G1q, G22, G23, ..., G2q, ..., Gqq. The matrix-like objects are
initialized similarly to load.symDMatrix.
list.files to create a character vector of file paths
that match a certain pattern.