Description Usage Arguments Details Value Note Author(s)
Setting tape file format/compression.
1 | makeFileFormat(compression="gz", compressionLevel=ifelse(compression == "bz", 9, 6))
|
compression |
Name of the compression algorithm; should be one of the |
compressionLevel |
|
rtape
uses R connections to store data; this function creates a function that is used to create a connection by the other rtape
's functions. Changing its parameters allows advanced user to change compression format/level and thus control the speed/file size trade-off. The default values (gzip, 6th level of compression) should give performance similar to this of save
.
The function to be passed to the fileFormat*
arguments of other rtape
's functions.
Effectively, this function is needed only to set up the format of the new, blank tape (i.e. in the first call to rtapeAdd
or for altering compression along with tape reconstruction operations performed by rtapeRerecord
or rtapeFilter
); when dealing with already existing tapes, the guessFileFormat
will recognise the right format from the file header.
Miron B. Kursa M.Kursa@icm.edu.pl
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