vector2array {ff} | R Documentation |
Array: make array from vector
Description
makes array from vector respecting dim and dimorder
Usage
vector2array(x, dim, dimorder = NULL)
Arguments
x |
an input vector, recyled if needed |
dim |
|
dimorder |
Details
FILLS vector into array of dim where fastest rotating is dim[dimorder[1]], next is dim[dimorder[2]] and so forth.
This is a generalization of converting vector to matrix(, byrow=TRUE).
NOTE that the result is a ram array always stored in STANDARD dimorder !!!
In this usage we sometimes term the dimorder 'bydim' because it does not change the physical layout of the result,
rather bydim refers to the dimorder in which to interpret the vector (not the result).
In ff
, update
and clone
we have 'bydim' to contrast it from 'dimorder', the latter describing the layout of the file.
Value
a suitable array
Author(s)
Jens Oehlschlägel
See Also
array2vector
, vectorIndex2arrayIndex
Examples
vector2array(1:12, dim=c(3, 4)) # matrix(1:12, 3, 4)
vector2array(1:12, dim=c(3, 4), dimorder=2:1) # matrix(1:12, 3, 4, byrow=TRUE)
[Package ff version 4.0.12 Index]