ffbase (version 0.13.3)

move.ffdf: Moves all the columns of ffdf data.frames into a directory

Description

move.ffdf saves all columns into the given dir. Each column is stored as with filename <ffdfname>$<colname>.ff. If you want to store the data for an other session please use save.ffdf or pack.ffdf

Usage

move.ffdf(
  x,
  dir = ".",
  name = as.character(substitute(x)),
  relativepath = FALSE
)

Arguments

x

ffdf data.frame to be moved

dir

path were all of supplied ffdf's, will be saved. It will be created if it doesn't exist.

name

name to be used as data.frame name

relativepath

If TRUE the ffdf will contain relativepaths. Use with care...

See Also

load.ffdf save.ffdf

Examples

# NOT RUN {
iris.ffdf <- as.ffdf(iris)

td <- tempfile()

# save the ffdf into the supplied directory
save.ffdf(iris.ffdf, dir=td)

# what in the directory?
dir(td)

#remove the ffdf from memory
rm("iris.ffdf")

# and reload the stored ffdf
load.ffdf(dir=td)

tf <- paste(tempfile(), ".zip", sep="")
packed <- pack.ffdf(file=tf, iris.ffdf)

#remove the ffdf from memory
rm("iris.ffdf")

# restore the ffdf from the packed ffdf
unpack.ffdf(tf)
# }