Physical and virtual attributes
Compatibility functions (to package ff) for getting and setting physical and virtual attributes.
## 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
x |
a ff or ram object |
value |
a list with named elements |
... |
further arguments |
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.
as.ram will retain some physical and virtual atrributes in
the ram clone, such that as.ff can restore an ff object
with the same attributes.
physical and virtual returns a list with named
elements
Jens Oehlschlägel
physical(bit(12)) virtual(bit(12))
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