R: Packs ffdf data.frames into a compressed file

pack.ffdf {ffbase} | R Documentation

## Packs ffdf data.frames into a compressed file

### Description

`pack.ffdf` stores ffdf data.frames into the given `file` for easy archiving and movement of data. The file can be restored using `unpack.ffdf`. If `file` ends with ".zip", the package will be zipped otherwise it will be tar.gz-ed.

### Usage

    pack.ffdf(file, ...)

### Arguments

`file` | packaged file, zipped or tar.gz.
`...` | ff objects to be packed

### See Also

`save.ffdf` `unpack.ffdf`

### Examples

    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)

[Package ffbase version 0.13.1 Index]