deepcopy | R Documentation |
This is needed to make a duplicate of a big.matrix
, with the new copy
optionally filebacked.
deepcopy(
x,
cols = NULL,
rows = NULL,
y = NULL,
type = NULL,
separated = NULL,
backingfile = NULL,
backingpath = NULL,
descriptorfile = NULL,
binarydescriptor = FALSE,
shared = options()$bigmemory.default.shared
)
x |
a |
cols |
possible subset of columns for the deepcopy; could be numeric, named, or logical. |
rows |
possible subset of rows for the deepcopy; could be numeric, named, or logical. |
y |
optional destination object ( |
type |
preferably specified, |
separated |
use separated column organization of the data instead of column-major organization; use with caution if the number of columns is large. |
backingfile |
the root name for the file(s) for the cache of |
backingpath |
the path to the directory containing the file-backing cache. |
descriptorfile |
we recommend specifying this for file-backing. |
binarydescriptor |
the flag to specify if the binary RDS format should
be used for the backingfile description, for subsequent use with
|
shared |
|
This is needed to make a duplicate of a big.matrix
, because
traditional syntax would only copy the object (the pointer to the
big.matrix
rather than the big.matrix
itself).
It can also make a copy of only a subset of columns.
a big.matrix
.
big.matrix
x <- as.big.matrix(matrix(1:30, 10, 3))
y <- deepcopy(x, -1) # Don't include the first column.
x
y
head(x)
head(y)
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