Full Storage Representation for Packed Matrices --- Generic Function
DESCRIPTION:
Expands decompositions stored in compact form into matrix factors. Methods are available for the following classes from the Matrix library: "unpack.Diagonal", "unpack.Identity", "unpack.ColPermutation", "unpack.RowPermutation"
USAGE: 
unpack(x, ...)
REQUIRED ARGUMENTS:
x:
a matrix stored in packed form.
OPTIONAL ARGUMENTS:
...:
additional arguments needed (not currently used in any method).
VALUE:
the full-storage representation of x.
EXAMPLES: 
library(Matrix)
x <- Diagonal( 1:3)
x
unpack(x)