Information for RPM R-bit-1.1.12-2.fc29.riscv64.rpm
| ID | 79346 | |||||||||||
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| Name | R-bit | |||||||||||
| Version | 1.1.12 | |||||||||||
| Release | 2.fc29 | |||||||||||
| Epoch | ||||||||||||
| Arch | riscv64 | |||||||||||
| Summary | A class for vectors of 1-bit booleans | |||||||||||
| Description | 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 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). | |||||||||||
| Build Time | 2018-05-15 00:52:09 GMT | |||||||||||
| Size | 238.21 KB | |||||||||||
| c115a21b78ab732a2665c4a7dcaed80c | ||||||||||||
| License | GPLv2 | |||||||||||
| Buildroot | f29-build-1122-469 | |||||||||||
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| Obsoletes | No Obsoletes | |||||||||||
| Conflicts | No Conflicts | |||||||||||
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| Recommends | No Recommends | |||||||||||
| Suggests | No Suggests | |||||||||||
| Supplements | No Supplements | |||||||||||
| Enhances | No Enhances | |||||||||||
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