open.ff {ff} | R Documentation |
open.ff
opens an ff file, optionally marking it readonly and optionally specifying a caching scheme.
open.ff(con, readonly = FALSE, pagesize = NULL, caching = NULL, ...)
con |
an ff object |
readonly |
readonly |
pagesize |
number of bytes to use as pagesize or NULL to take the pagesize stored in the physical attribute of the ff object, see getalignedpagesize |
caching |
one of 'mmnoflush' or 'mmeachflush', see ff |
... |
further arguments (not used) |
ff objects will be opened automatically when accessing their content and the file is still closed
an opened ff object
Jens Oehlschlägel
ff
, close.ff
, delete
, deleteIfOpen
, getalignedpagesize
x <- ff(1:12) close(x) is.open(x) open(x) is.open(x) close(x) is.open(x) x[] is.open(x) y <- x close(y) is.open(x)