zave: Serialize one or more R objects to a zip archive
In statwonk/Rcompression: In-memory decompression for GNU zip and bzip2 formats.

Description Usage Arguments Value Author(s) See Also Examples

This is an alternative to the save function in R that saves a collection of R variables to a single archive file but maintains them in seperate "files" within the archive and allows them to be restored as a group or individually. Additionally, one can readily determine the names of the variables in the archive using names. There is an optional table of contents that allows us to determine the class and size of each object.

This format can be extended to know how to "jump" directly to a variable and so provide quick access to individual elements.

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zave(..., list = character(), file = stop("Must specify file name"), 
      envir = parent.frame(), compression_level = 9, .addToc = TRUE, 
       append = FALSE)

`...`	the objects to be serialized, specified by expression or variable name. These values can also be given as `name = val` and the name is used as the name in the resulting archive
`list`	like `save`, this is a way of specifying the variables to serialize by explicit variable name.
`file`	the name of the file to create or append to
`envir`	where to find the variables specified by name via `list`.
`compression_level`	the level of compression to use for the zip file. See `zip`.
`.addToc`	a logical value indicating whether to compute and add a table of contents data frame to the archive. This is a data frame containing the class and object size of the elements.
`append`	a logical value passed to `zip`

An object of class RdzArchive-class or an error.

Duncan Temple Lang

load zip serialize save

 x = 1:10
 y = letters
 bob = zave(x, y, mtcars, other = x, file = "/tmp/bob.zip", bobo = 1:10, zz = 2 * log(1:100), oo = rnorm(10))
 names(bob)
 bob$.toc
 bob[["y"]]
 bob$oo
 bob[]
 load(bob)  # put them into the global environment


  # Appending to a previously created Rdz file.
 a = zave(mtcars, file = "bob.Rdz", append = FALSE)
 a$x = 1:10


  # Dealing with duplicates
  # Now that we have replace = TRUE, a$x replaces the existing x by default.
 a = zave(mtcars, file = "bob.Rdz", append = FALSE)
 a[["x"]] = 1:10
 a[["x", replace = FALSE]] = letters
 a[["x", replace = FALSE]] = 20

 a[["x"]]
 a[["x", last = FALSE]] # first x
 a[[4]]  # 2nd x, index includes .toc


 a = zave(list = list(mtcars = mtcars, x = 1:10, x = letters, x = 20),  file = "bob.Rdz", append = FALSE)
 a[["x"]]
 a[["x", last = FALSE]]
 a[[4]]  # 2nd x, index includes .toc