Package: r-cran-bit (4.0.5-1 and others)

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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).

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

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dep: libc6 (>= 2.27) [riscv64]

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Download r-cran-bit

Download for all available architectures
Architecture	Version	Package Size	Installed Size	Files
alpha (unofficial port)	4.0.5-1	1,038.2 kB	1,379.0 kB	[list of files]
amd64	4.0.5-1	1,045.4 kB	1,352.0 kB	[list of files]
arm64	4.0.5-1	1,033.6 kB	1,379.0 kB	[list of files]
armel	4.0.5-1	1,032.4 kB	1,378.0 kB	[list of files]
armhf	4.0.5-1	1,035.4 kB	1,314.0 kB	[list of files]
hppa (unofficial port)	4.0.5-1	1,036.3 kB	1,353.0 kB	[list of files]
i386	4.0.5-1	1,044.9 kB	1,366.0 kB	[list of files]
ia64 (unofficial port)	4.0.5-1	1,048.1 kB	1,468.0 kB	[list of files]
m68k (unofficial port)	4.0.5-1	1,035.7 kB	1,330.0 kB	[list of files]
mips64el	4.0.5-1	1,034.1 kB	1,386.0 kB	[list of files]
ppc64 (unofficial port)	4.0.5-1	1,047.4 kB	1,446.0 kB	[list of files]
ppc64el	4.0.5-1	1,048.1 kB	1,444.0 kB	[list of files]
riscv64	4.0.5-1+b1	1,043.8 kB	1,336.0 kB	[list of files]
s390x	4.0.5-1	1,041.7 kB	1,379.0 kB	[list of files]
sh4 (unofficial port)	4.0.5-1	1,041.0 kB	1,378.0 kB	[list of files]
sparc64 (unofficial port)	4.0.5-1	1,034.2 kB	2,279.0 kB	[list of files]
x32 (unofficial port)	4.0.5-1	1,038.8 kB	1,343.0 kB	[list of files]