bit: bit_rangediff – R documentation

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bit

bit_rangediff

bit range difference

Description

Fast version of setdiff(rx[1]:rx[2], y).

Usage

bit_rangediff(rx, y, revx = FALSE, revy = FALSE)

Arguments

`rx`	range of integers given as `ri` or as a two-element `integer`
`y`	an integer vector of elements to exclude
`revx`	`FALSE` as is, `TRUE` to reverse the direction and sign of `rx`
`revy`	`FALSE` as is, `TRUE` to reverse the direction and sign of `y`

Details

determines the range of the integers y and checks if the density justifies use of a bit vector; if yes, uses a bit vector for the set operation; if no, falls back to a quicksort and merge_rangediff

Value

an integer vector

Examples

bit_rangediff(c(1L,6L), c(3L,4L))
bit_rangediff(c(6L,1L), c(3L,4L))
bit_rangediff(c(6L,1L), c(3L,4L), revx=TRUE)
bit_rangediff(c(6L,1L), c(3L,4L), revx=TRUE, revy=TRUE)

bit

Classes and Methods for Fast Memory-Efficient Boolean Selections

v4.0.4

GPL-2 | GPL-3

Authors

Jens Oehlschlägel [aut, cre], Brian Ripley [ctb]

Initial release

2020-08-03