R: bit set operations

bit_setops {bit} | R Documentation

## bit set operations

### Description

Fast versions of `union`, `intersect`, `setdiff`, symmetric difference and `setequal` for integers.

### Usage

    bit_union(x, y)

    bit_intersect(x, y)

    bit_setdiff(x, y)

    bit_symdiff(x, y)

    bit_setequal(x, y)

### Arguments

`x` | an integer vector
`y` | an integer vector

### Details

determines the range of the integers and checks if the density justifies use of a bit vector; if yes, uses a bit vector for finding duplicates; if no, falls back to `union`, `intersect`, `setdiff`, `union(setdiff(x,y),setdiff(y,x))` and `setequal`

### Value

an integer vector

### Functions

- `bit_union`: union

- `bit_intersect`: intersection

- `bit_setdiff`: asymmetric difference

- `bit_symdiff`: symmetricx difference

- `bit_setequal`: equality

### See Also

`bit_in`, `bit_rangediff`

### Examples

    bit_union(1:2, 2:3)
    bit_intersect(1:2, 2:3)
    bit_setdiff(1:2, 2:3)
    bit_symdiff(1:2, 2:3)
    bit_setequal(1:2, 2:3)
    bit_setequal(1:2, 2:1)

[Package bit version 4.0.4 Index]