套件：r-cran-bit（4.0.5-1 以及其他的）

[ 原始碼： r-cran-bit  ]

GNU R class for vectors of 1-bit booleans

This GNU R package provides bitmapped vectors of booleans (no NAs), coercion from and to logicals, integers and integer subscripts; fast boolean operators and fast summary statistics. With 'bit' vectors you can store true binary booleans {FALSE,TRUE} at the expense of 1 bit only, on a 32 bit architecture this means factor 32 less RAM and ~ factor 32 more speed on boolean operations. Due to overhead of R calls, actual speed gain depends on the size of the vector: expect gains for vectors of size > 10000 elements. Even for one-time boolean operations it can pay-off to convert to bit, the pay-off is obvious, when such components are used more than once.

Reading from and writing to bit is approximately as fast as accessing standard logicals - mostly due to R's time for memory allocation. The package allows one to work with pre-allocated memory for return values by calling .Call() directly: when evaluating the speed of C-access with pre-allocated vector memory, coping from bit to logical requires only 70% of the time for copying from logical to logical; and copying from logical to bit comes at a performance penalty of 150%. the package now contains further classes for representing logical selections: 'bitwhich' for very skewed selections and 'ri' for selecting ranges of values for chunked processing. All three index classes can be used for subsetting 'ff' objects (ff-2.1-0 and higher).

其他與 r-cran-bit 有關的套件

• dep: libc6 (>= 2.16) [x32]

  GNU C 函式庫：共用函式庫
  同時作為一個虛擬套件由這些套件填實： libc6-udeb

  dep: libc6 (>= 2.17) [arm64, ppc64el]

  dep: libc6 (>= 2.2) [hppa]

  dep: libc6 (>= 2.27) [riscv64]

  dep: libc6 (>= 2.36) [sh4]

  dep: libc6 (>= 2.4) [除 alpha, arm64, hppa, ia64, ppc64el, riscv64, sh4, x32]

• dep: libc6.1 (>= 2.1.3) [alpha]

  GNU C 函式庫：共用函式庫
  同時作為一個虛擬套件由這些套件填實： libc6.1-udeb

  dep: libc6.1 (>= 2.36) [ia64]

• dep: r-api-4.0

  本虛擬套件由這些套件填實： r-base-core

• dep: r-base-core (>= 4.2.2.20221110-1) [除 riscv64]

  GNU R core of statistical computation and graphics system

• sug: r-cran-bit64 (>= 4.0.0)

  GNU R S3 Class for Vectors of 64bit Integers

• sug: r-cran-ff (>= 4.0.0)

  Memory-Efficient Fast-Access Storage of Large Data

• sug: r-cran-knitr

  GNU R package for dynamic report generation using Literate Programming

• sug: r-cran-rmarkdown

  convert R markdown documents into a variety of formats

• sug: r-cran-roxygen2

  in-line documentation for GNU R

• sug: r-cran-testthat (>= 0.11.0)

  GNU R testsuite

下載 r-cran-bit

下載可用於所有硬體架構的

硬體架構	版本	套件大小	安裝後大小	檔案
alpha （非官方移植版）	4.0.5-1	1，038。2 kB	1，379。0 kB	[檔案列表]
amd64	4.0.5-1	1，045。4 kB	1，352。0 kB	[檔案列表]
arm64	4.0.5-1	1，033。6 kB	1，379。0 kB	[檔案列表]
armel	4.0.5-1	1，032。4 kB	1，378。0 kB	[檔案列表]
armhf	4.0.5-1	1，035。4 kB	1，314。0 kB	[檔案列表]
hppa （非官方移植版）	4.0.5-1	1，036。3 kB	1，353。0 kB	[檔案列表]
i386	4.0.5-1	1，044。9 kB	1，366。0 kB	[檔案列表]
ia64 （非官方移植版）	4.0.5-1	1，048。1 kB	1，468。0 kB	[檔案列表]
m68k （非官方移植版）	4.0.5-1	1，035。7 kB	1，330。0 kB	[檔案列表]
mips64el	4.0.5-1	1，034。1 kB	1，386。0 kB	[檔案列表]
ppc64 （非官方移植版）	4.0.5-1	1，047。4 kB	1，446。0 kB	[檔案列表]
ppc64el	4.0.5-1	1，048。1 kB	1，444。0 kB	[檔案列表]
riscv64	4.0.5-1+b1	1，043。8 kB	1，336。0 kB	[檔案列表]
s390x	4.0.5-1	1，041。7 kB	1，379。0 kB	[檔案列表]
sh4 （非官方移植版）	4.0.5-1	1，041。0 kB	1，378。0 kB	[檔案列表]
sparc64 （非官方移植版）	4.0.5-1	1，034。2 kB	2，279。0 kB	[檔案列表]
x32 （非官方移植版）	4.0.5-1	1，038。8 kB	1，343。0 kB	[檔案列表]