This reports for each of the files produced by save the size,
if it was saved in ASCII or XDR binary format, and if it was
compressed (and if so in what format).
Usually such files have extension .rda or .RData, hence
the name of the function.
checkRdaFiles(paths)
resaveRdaFiles(paths, compress = c("auto", "gzip", "bzip2", "xz"),
compression_level, version = NULL)A character vector of paths to save files. If
this specifies a single directory, it is taken to refer to all
.rda and .RData files in that directory.
Type and level of compression: see
save. Values of compress can be abbreviated.
The format to be used when re-saving: see
save.
For checkRdaFiles, a data frame with rows names paths
and columns
numeric: file size in bytes, NA if the file does
not exist.
logical: true for save(ASCII = TRUE), NA if the
format is not that of an R save file.
character: type of compression. One of "gzip",
"bzip2", "xz", "none" or "unknown" (which
means that if this is an R save file it is from a later version of
R).
integer: the version of the save -- usually 2
but 1 for very old files, and NA for other files.
Unfortunately 2 means ‘version 2 or later’.
compress = "auto" asks R to choose the compression and ignores
compression_level. It will try "gzip", "bzip2"
and if the "gzip" compressed size is over 10Kb, "xz" and
choose the smallest compressed file (but with a 10% bias towards
"gzip"). This can be slow.
For back-compatibility, version = NULL is interpreted to mean
version 2: however version-3 files will only be saved as version 3.
# NOT RUN {
## from a package top-level source directory
paths <- sort(Sys.glob(c("data/*.rda", "data/*.RData")))
(res <- checkRdaFiles(paths))
## pick out some that may need attention
bad <- is.na(res$ASCII) | res$ASCII | (res$size > 1e4 & res$compress == "none")
res[bad, ]
# }
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