PhysVirt: Physical and virtual attributes

In bit: Classes and Methods for Fast Memory-Efficient Boolean Selections

Physical and virtual attributes

Description

Compatibility functions (to package ff) for getting and setting physical and virtual attributes.

Usage

## Default S3 method:
physical(x)

## Default S3 replacement method:
physical(x) <- value

## Default S3 method:
virtual(x)

## Default S3 replacement method:
virtual(x) <- value

## S3 method for class 'physical'
print(x, ...)

## S3 method for class 'virtual'
print(x, ...)

physical(x)

physical(x) <- value

virtual(x)

virtual(x) <- value

Arguments

x	a ff or ram object
value	a list with named elements
...	further arguments

Details

ff objects have physical and virtual attributes, which have different copying semantics: physical attributes are shared between copies of ff objects while virtual attributes might differ between copies. ff::as.ram() will retain some physical and virtual atrributes in the ram clone, such that ff::as.ff() can restore an ff object with the same attributes.

Value

physical and virtual returns a list with named elements

Author(s)

Jens Oehlschlägel

See Also

ff::physical.ff(), ff::physical.ffdf()

Examples

  physical(bit(12))
  virtual(bit(12))

bit documentation built on April 4, 2025, 3:09 a.m.