Read an S3 Binary or data.dump File — S3 read functions • foreign

Reads binary data files or data.dump files that were produced in S version 3.

data.restore(file, print = FALSE, verbose = FALSE, env = .GlobalEnv)
  read.S(file)

Arguments

file: the filename of the S-PLUS data.dump or binary file.
print: whether to print the name of each object as read from the file.
verbose: whether to print the name of every subitem within each object.
env: environment within which to create the restored object(s).

Value

For read.S, an R version of the S3 object.

For data.restore, the name of the file.

Details

read.S can read the binary files produced in some older versions of S-PLUS on either Windows (versions 3.x, 4.x, 2000) or Unix (version 3.x with 4 byte integers). It automatically detects whether the file was produced on a big- or little-endian machine and adapts itself accordingly.

data.restore can read a similar range of files produced by data.dump and for newer versions of S-PLUS, those from data.dump(....., oldStyle=TRUE).

Not all S3 objects can be handled in the current version. The most frequently encountered exceptions are functions and expressions; you will also have trouble with objects that contain model formulas. In particular, comments will be lost from function bodies, and the argument lists of functions will often be changed.

Author

Duncan Murdoch

Examples

## if you have an S-PLUS _Data file containing 'myobj'
if (FALSE) read.S(file.path("_Data", "myobj"))
data.restore("dumpdata", print = TRUE)
#> Warning: cannot open file 'dumpdata': No such file or directory
#> Error in file(file, open = "rt"): cannot open the connection
 # \dontrun{}