qopt {qs2} | R Documentation |
qs2 Option Getter/Setter
Description
Get or set a global qs2 option.
Usage
qopt(parameter, value = NULL)
Arguments
parameter |
A character string specifying the option to access. Must be one of "compress_level", "shuffle", "nthreads", "validate_checksum", "warn_unsupported_types", or "use_alt_rep". |
value |
If |
Details
This function provides an interface to retrieve or update internal qs2 options such as compression level, shuffle flag, number of threads, checksum validation, warning for unsupported types, and ALTREP usage. It directly calls the underlying C-level functions.
The default settings are:
-
compress_level
: 3L -
shuffle
: TRUE -
nthreads
: 1L -
validate_checksum
: FALSE -
warn_unsupported_types
: TRUE (used only inqd_save
) -
use_alt_rep
: FALSE (used only inqd_read
)
When value
is NULL
, the current value of the specified option is returned.
Otherwise, the option is set to value
and the new value is returned invisibly.
Value
If value
is NULL
, returns the current value of the specified option.
Otherwise, sets the option and returns the new value invisibly.
Examples
# Get the current compression level:
qopt("compress_level")
# Set the compression level to 5:
qopt("compress_level", value = 5)
# Get the current shuffle setting:
qopt("shuffle")
# Get the current setting for warn_unsupported_types (used in qd_save):
qopt("warn_unsupported_types")
# Get the current setting for use_alt_rep (used in qd_read):
qopt("use_alt_rep")