.subset(x, ...)
.subset2(x, ...)
.getRequiredPackages(file = "DESCRIPTION", lib.loc = NULL, quietly = FALSE, useImports = FALSE)
.getRequiredPackages2(pkgInfo, quietly = FALSE, lib.loc = NULL, useImports = FALSE)
testPlatformEquivalence(built, run)
.isMethodsDispatchOn(onOff = NULL)
sys.load.image(name, quiet)
sys.save.image(name)
.row_names_info(x, type = 1L)
.set_row_names(n)
findPackageEnv(info)
lazyLoadDBfetch(key, file, compressed, hook)
.TAOCP1997init(seed)
.gt(x, i, j)
.gtn(x, strictly)
.primTrace(obj)
.primUntrace(obj)
.POSIXct(xx, tz = NULL)
.POSIXlt(xx, tz = NULL)
.difftime(xx, units)
.cache_class(class, extends)
.popath
.mapply(FUN, dots, MoreArgs)
.detach(pos)
.maskedMsg(same, pkg, by)NULL. The default value
of NULL corresponds to all libraries currently known to
.libPaths().Imports field be processed?"packageDescription2"."cpu-vendor-os"."row.names" attribute, typically a
data frame.type = 0 returns the internal
"row.names" attribute (possibly NULL), type = 2
the number of rows implied by the attribute, and type = 1 the
latter with a negative sign for ‘automatic’ row names."package:MASS".unserialize.difftime.match.fun.FUN.pkg, or (by = FALSE) from pkg..getRequiredPackages and .getRequiredPackages2
return invisible().testPlatformEquivalence returns TRUE or FALSE.
.subset and .subset2 are essentially
equivalent to the [ and [[ operators,
except that methods dispatch does not take place. This is to avoid
expensive unclassing when applying the default method to an object. They
should not normally be invoked by end users. Note that unlike the
operators they are builtins and not specials (all arguments are
evaluated) and hence do not allow missing arguments. .getRequiredPackages2 attaches all the packages mentioned in the
Depends field: failure to find a package is an error. It also
checks the versions of the packages found against the Depends field.
.getRequiredPackages is a wrapper to
.getRequiredPackages2 using a ‘DESCRIPTION’ file.
testPlatformEquivalence is used to test if a package with
compiled code can safely be loaded into a build of R, which it does by
comparing their ‘canonical’ "cpu-vendor-os" descriptions.
The default function omits the vendor part and allows small
mismatches elsewhere.
The function .isMethodsDispatchOn() returns TRUE if
the S4 method dispatch has been turned on in the evaluator (usually by
loading package methods). It is meant for R internal use only.
sys.save.image is a system function that is called by q()
and its GUI analogs; sys.load.image is called by the startup code.
These functions should not be called directly and are subject to change.
sys.save.image closes all connections first, to ensure that it
is able to open a connection to save the image. This is appropriate
when called from q() and allies, but reinforces the warning
that it should not be called directly.
row.names can be stored internally in compact form.
.set_row_names(n) generates that form for automatic row names
of length n, to be assigned to
attr(, "row.names"). .row_names_info
gives information on the internal form of the row names for a data
frame: for details of what information see the argument type.
.GenericArgsEnv and .ArgsEnv are environments that
contain closures with the argument lists that the primitives would
have had had they been closures. All the primitives that are internal
S3 generics have corresponding members of .GenericArgsEnv and
the remaining non-language-element primitives correspond to
.ArgsEnv. See the ‘R Internals’ manual for further
details. They are used by args and
print.default and the QC functions codoc
and checkS3methods.
findPackageEnv is invoked by the unserialize code to set a
saved environment if possible.
.TAOCP1997init is the initialization code for the
"Knuth-TAOCP" RNG.
.gt and .gtn are callbacks from rank and
is.unsorted used for S3 classed objects.
.primTrace and .primUntrace are the primitive
functions underlying trace and untrace
respectively.
.POSIXct, .POSIXlt and .difftime are class
generators.
.cache_class caches the inheritance of an S4 class for use in
S3 method dispatch. With NULL second argument it returns the
cached inheritance, for diagnostic use.
.popath is a variable created at startup which records where
the translations package in use is.
.mapply and .detach are ‘bare-bones’ versions for
use in other R packages.
.maskedMsg is a utility called both from attach()
and library() for consistency to produce the warning message.
Objects starting .C_ and .F_ are references to
registered C and Fortran entry points.